Chase Center allows a bag of 14 inches, and 10″ x 6″ x 2″ decides which entrance takes it
Chase Center allows one bag per guest up to 14 inches by 6 inches by 14 inches, and that maximum covers diaper bags and medical bags too. Bags do not need to be clear. A bag under 10″ x 6″ x 2″ enters at any entrance, while anything larger is screened by X-ray, read September 2026.
Two numbers are doing different jobs, and only the larger one is a yes or a no. The 14 inch figure settles whether the bag comes in. The smaller one settles where its owner queues while it is screened, which is a routing instruction written as a size.
| Item at the Chase Center door, read September 2026 | What Chase Center publishes | Which entrance it can use |
|---|---|---|
| Handbag, tote or fanny pack | Permitted up to 14″ x 6″ x 14″ | Any entrance under 10″ x 6″ x 2″, otherwise a designated X-ray lane |
| Diaper bag or medical bag | Permitted, and counted inside the same 14″ x 6″ x 14″ maximum | The same two thresholds as any other bag |
| Clear plastic bag | Permitted, though bags do not need to be clear | The same two thresholds, since transparency buys no extra size |
| Backpack with more than one compartment | Not permitted | n/a, it does not enter at any size |
| Single compartment drawstring bag or backpack purse | Permitted inside 14″ x 6″ x 14″ | Screened on the same two thresholds as a tote |
| Bicycle helmet | Not permitted inside | Bike Valet on Terry A Francois Blvd, held at no charge |
Every row answers two questions, and the second answer is a place rather than a permission.
The Chase Center maximum counts a diaper bag and a medical bag inside the same 14 inches
The maximum bag size is 14″ x 6″ x 14″, and according to Chase Center that limit applies to all bags, with the same sentence naming handbags, totes, fanny packs, diaper bags and medical bags, read September 2026.
That wording removes the exemption most parents arrive expecting. A diaper bag is not a category at Chase Center. It is a bag, judged by the same three dimensions as a tote, and a medical bag enters on its size rather than on its purpose.
A 14 inch by 6 inch by 14 inch envelope is roomy by arena standards, so the rule is generous in volume and strict in scope. The box does not grow because a baby is in the party, though a family that splits its load across two adults stays inside it.
Bags do not need to be clear at Chase Center, and a clear tote buys no extra inches
Bags do not need to be clear, in the wording Chase Center publishes, read September 2026, and a transparent bag is measured against the same 14″ x 6″ x 14″ maximum as an opaque one.
American football crowds have learned that transparency is the currency that buys volume, which is how a clear bag rule is built. The rule at Chase Center runs the trade in reverse. It fixes the volume and leaves the material open, so a clear tote bought for a Sunday in another city is admitted only if it fits.
Material changes nothing at a Chase Center door.
A backpack enters Chase Center only when it carries a single compartment
Backpacks are not permitted at Chase Center, read September 2026, with two exceptions the arena names: a drawstring bag with a single compartment, and a fashion backpack purse that also has a single compartment.
The test is the number of compartments, unusual enough to catch a bag that would pass on size. A drawstring sack with one opening is admitted. A daypack of the same volume with a front zip pocket is not, because the second compartment disqualifies it.
Both exceptions still have to fit inside 14″ x 6″ x 14″, so the compartment rule narrows the maximum rather than replacing it. What gets counted at the door is zips, not liters.
Under 10″ x 6″ x 2″ a bag opens every Chase Center entrance, and above it only the X-ray lanes
Chase Center publishes a second threshold underneath the maximum: a bag smaller than 10″ x 6″ x 2″ may be brought through any entrance, while a bag between that size and 14″ x 6″ x 14″ has to be screened by X-ray at the designated lanes, read September 2026.
That sentence reshapes an evening, and it is not really a size rule. Two guests holding legal bags get sent to different doors. The one carrying a phone and a wallet walks to whichever entrance is closest to the Muni platform, the ferry landing or the garage stairwell. The one carrying a 14 inch tote walks to a designated lane and queues with everyone else who did the same.
Mission Bay geometry makes that detour expensive. The building sits at 1 Warriors Way, the Chase Center Garage at 99 Warriors Way and accessible parking at 150 Warriors Way, and Warriors Way and 16th Street both run one way westbound on event days. A driver who parks, walks to the closest door and only then learns the tote needs an X-ray lane walks back against an arriving crowd.
The bag chooses the door. The door chooses the queue.
Chase Center bag check runs on a $10 donation at Terry A Francois Blvd and 16th Street
Bag check at Chase Center sits beside the East Entrance, at the corner of Terry A Francois Blvd and 16th Street, on a $10 donation per bag that the Chase Center bag policy lists as subject to change, read September 2026.
Calling it a donation rather than a fee is not cosmetic. A donation is not a published tariff, so the figure can move without anything being repriced, and the escape clause sits in the same line. What it buys is narrow: a place to leave what will not pass, outside the doors on the east side.
Beside its neighbors the $10 stands out. Allegiant Stadium charges $20 per bag, non-refundable, across three bag check points, with anything unclaimed going to lost and found for 14 days. T-Mobile Arena prices its Binbox Lockers from $20 per checked bag and shuts them 45 minutes after the event. Sphere publishes that it provides no area to check bags, coats or any other personal belongings at all.
The Chase Center Bike Valet holds the helmet the arena refuses, and it opens 1 hour before
Bicycle helmets do not enter Chase Center and are held at no charge at the Bike Valet on Terry A Francois Blvd, which opens 1 hour before the event and closes 1 hour after it, read September 2026.
Bike storage itself carries a $10 donation, the same figure attached to bag check, and the helmet rides free inside that arrangement. The rule sits oddly beside the maximum, because a helmet is smaller than 14″ x 6″ x 14″ and would disappear inside a compliant tote. It is refused anyway. A named object can be turned away at any size.
How a guest reaches Chase Center decides what an oversized bag can still do
Every route into Mission Bay ends at the same doors, read September 2026, and none leaves a refused bag the same options once the 14″ x 6″ x 14″ maximum has ruled on it.
| Arrival at Chase Center, read September 2026 | What Chase Center publishes | Where a refused bag can go | Best for |
|---|---|---|---|
| Chase Center Garage, 99 Warriors Way | Public parking from 8:00 a.m. until 4 hours before at $7 per hour to a $35 daily maximum; event parking from 2 hours before at $75 on top | Back to the car, but only before the event starts | Drivers who arrive before the public window closes |
| Muni Metro T line, plus extra S trains on event days | The event ticket is the all-day complimentary Muni ticket | Bag check beside the East Entrance, on a $10 donation | Guests who can settle the bag before leaving home |
| Bus 78X to and from 16th St Mission BART | Runs from 2.5 hours before the event until 1 hour after | Bag check beside the East Entrance, on a $10 donation | Guests arriving on BART from the Mission or Powell St |
| SF Bay Ferry to Pier 48 | Served from Oakland and Alameda for every home game | Bag check beside the East Entrance, on a $10 donation | East Bay guests avoiding the bridge |
| Caltrain, then a Muni transfer or a 20 minute walk | Transfer at San Francisco Station, or walk 20 minutes | Bag check beside the East Entrance, on a $10 donation | Peninsula guests traveling light |
| Bike Valet on Terry A Francois Blvd | Opens 1 hour before and closes 1 hour after, on a $10 donation | The valet counter, which also holds the helmet at no charge | Cyclists, and only for helmets and bikes |
The winner is the driver who reaches the garage before the public window shuts, and the criterion is reversibility rather than price. A car is storage the guest controls, and the Chase Center Garage charges $7 per hour to a $35 daily maximum for public parking that runs from 8:00 a.m. until 4 hours before the event. No vehicle enters between 4 hours and 2 hours out, event parking opening 2 hours before costs $75 on top of the accumulated public rate, and public parkers have to leave before the event begins, so the car stops working as a locker the moment the doors open. The garage also turns away any vehicle taller than 6 feet 8 inches without prior authorization. Everything else converges on one counter beside the East Entrance, and the wider Mission Bay picture sits in the Chase Center guide to parking, Muni access and leaving Mission Bay.
Four Western venues, four answers to the same diaper bag question
A diaper bag is the sharpest test any bag policy faces, because it is the one bag a guest cannot repack on the pavement, and four Western venues answer it four different ways, all read in September 2026.
| Venue, read September 2026 | Bag limit published | How the diaper bag is treated | Where a refused bag goes |
|---|---|---|---|
| Chase Center, San Francisco | 14″ x 6″ x 14″ maximum, and bags do not need to be clear | Counted inside the maximum, with no exception | Bag check beside the East Entrance, on a $10 donation |
| Allegiant Stadium, Las Vegas | Clear bag of 12″ x 6″ x 12″, plus an opaque clutch of 4.5″ x 6.5″ x 2″ | Prohibited outright, with medical items the only published exception | Three bag check points at Allegiant Stadium, $20 per bag, non-refundable |
| Sphere, Las Vegas | No bag venue, with a clutch or fanny pack of about 6″ x 6″ x 2″ | Permitted, named separately from the clutch limit | Nowhere, since Sphere provides no area to check bags or coats |
| T-Mobile Arena, Las Vegas | Small personal bag of 9″ x 5″ x 2″, and bags do not need to be transparent | Permitted, and checked at Guest Services if its size obstructs | Binbox Lockers at T-Mobile Arena, from $20 per checked bag |
Four buildings, one question, four incompatible answers. On volume Chase Center is generous and on exceptions it is closed, so a parent gets the roomiest bag and no special treatment. Allegiant Stadium refuses the diaper bag outright, admitting only necessary medical items, which turns a routine item into a $20 transaction at a bag check window. Sphere names the diaper bag separately from its clutch rule, and T-Mobile Arena admits baby bags, bottles and formula while reserving the right to check the bag if its size obstructs. Doors for concerts there generally open 60 minutes before the event and the lockers open with them, so a bag solved in that queue is solved too late.
For a parent flying between these cities the winner is Chase Center, and the criterion is predictability: one number governs everything, so the packing decision happens at home with a tape measure. The nuance is that the same rule offers no relief once the bag is genuinely too big, while Sphere keeps its exception open. The three Las Vegas venues share a district and its garages, traced street by street in the guide to Las Vegas Strip venue parking across Allegiant Stadium, Sphere and T-Mobile Arena.
The same Chase Center document sends one $10 donation to two different foundations
In one passage the bag check donation at Chase Center goes to the Golden State Community Foundation, and in another passage of the same document it goes to the Warriors Community Foundation, read September 2026.
Both names belong to the issuer, and there is no second publisher to break the tie. A guest handing over $10 is donating to whichever entity the counter books it to, and the document does not settle which.
The Bike Valet reads like a second wobble and is not one. The venue calls it free on the transportation pages and attaches a $10 donation in the bag policy because the stand does three jobs at two prices: a bike is free, a helmet is free, and an oversized bag costs the donation. The figure is the stable part of both contradictions. The recipient is not.
Where a Chase Center bag plan comes apart before the East Entrance
Six details in the same policy decide whether a bag problem at Chase Center costs a walk, a $10 donation or a slower queue, all read September 2026.
- Bringing a clear tote sized for a football stadium, when a clear bag at Chase Center is measured against the same 14″ x 6″ x 14″ maximum as an opaque one.
- Treating a diaper bag as exempt, when the published maximum names diaper bags and medical bags inside it.
- Carrying a daypack that passes on size but has two compartments, when only single compartment bags are admitted.
- Walking to the nearest door with a bag above 10″ x 6″ x 2″, when that size is screened only in the designated X-ray lanes.
- Cycling in wearing a helmet and expecting to carry it inside, when helmets are held at the Bike Valet at any size.
- Leaving a bag in the car for the evening, when public parking at the Chase Center Garage empties before the event starts.
All six share a shape. Each is a rule from another building applied to a door that never adopted it.
Which Chase Center document carried each rule in this guide
Every Chase Center figure above was read on 4 September 2026 through the arena’s own content API, because chasecenter.com serves almost no text to a plain request. The bag policy document carries the 14″ x 6″ x 14″ maximum, the sentence that bags do not need to be clear, the backpack exceptions, the 10″ x 6″ x 2″ screening threshold and the $10 bag check donation beside the East Entrance. The transportation and parking documents carry the garage rates and windows, the Muni ticket clause, the 78X service span and the Bike Valet hours. Rows for Allegiant Stadium come from allegiantstadium.com, for Sphere from thesphere.com and for T-Mobile Arena from t-mobilearena.com, all read on 3 and 4 September 2026.
The figures in this guide were verified in September 2026 against the sources named in each section. Bag rules change between seasons, screening lanes change by event, and donation amounts are listed as subject to change; check the issuer’s page before you travel.
Questions Chase Center ticket holders ask about bags
The answers below come from the Chase Center bag policy, transportation and parking documents, all read on 4 September 2026.
Bags at Chase Center are allowed up to 14 by 6 by 14 inches, and that maximum covers handbags, totes, fanny packs, diaper bags and medical bags, read September 2026. A clear bag is not required. Backpacks are refused unless they are a single compartment drawstring bag or backpack purse.
No. The published wording is that bags do not need to be clear at Chase Center, read September 2026, so material is not the test at the door. A clear bag is measured against the same 14 by 6 by 14 inch maximum as an opaque one, and transparency buys no extra size.
Backpacks are not permitted at Chase Center, read September 2026, with two exceptions: a drawstring bag with a single compartment, and a fashion backpack purse with a single compartment. Both still have to fit inside the 14 by 6 by 14 inch maximum that applies to every bag.
Yes, and they are counted inside the ordinary limit. The 14 by 6 by 14 inch maximum at Chase Center applies to all bags, naming diaper bags and medical bags among them, read September 2026. Allegiant Stadium, by contrast, publishes no exception for diaper bags at all.
Yes. Bag check sits beside the East Entrance at Terry A Francois Blvd and 16th Street, on a $10 donation per bag that Chase Center lists as subject to change, read September 2026. The Bike Valet on the same street carries the same $10 donation for a bicycle.
No. Bicycle helmets do not enter Chase Center and are held at no charge at the Bike Valet on Terry A Francois Blvd, which opens 1 hour before the event and closes 1 hour after it, read September 2026. Size makes no difference to that rule.
A size limit that sorts guests into entrances is a queue design as much as a door rule
Most bag policies answer one question: whether the bag comes in. Chase Center answers two, read September 2026, and the second is spatial: the 10″ x 6″ x 2″ line splits an arriving crowd into guests who can use any entrance and guests who cannot.
The maximum decides what you carry. The smaller number decides where you stand.