The right iPhone case size is the one made for your exact model name, such as iPhone 16 Pro or iPhone 17e, and not just a phone with the same screen size. Find the model in Settings > General > About, then choose that same model in the case's size selector. Close doesn't count, because cameras and buttons shift between generations.
Apple's About screen shows a part number that turns into the model number when you tap it. Cases rarely carry over, since the iPhone 16 adds the Action button and Camera Control to an iPhone 15-sized body. Apple publishes exact dimensions for each model, and no pair is Apple-approved as case-compatible, though the iPhone 16e and 17e come closest. A wrong-size case is returnable on request within 14 days of receipt, unused, in the condition received and in its original packaging.
How do you find the right case size for your iPhone?
You find the right case size by matching the case listing to your iPhone's exact model name, then checking its camera and button openings. Screen size won't tell you. Apple calls the iPhone 15, iPhone 16, iPhone 16e and iPhone 17e all 6.1-inch phones, yet each of Apple's own cases lists just one of them.
Work through these five steps before a case goes in your cart.
- Identify your iPhone model on the About screen in Settings.
- Write down the full model name with its suffix, because iPhone 16, iPhone 16 Plus, iPhone 16 Pro, iPhone 16 Pro Max and iPhone 16e are five separate case sizes.
- Choose that exact model in the case's size selector, and skip any case listing that groups several generations without naming yours.
- Check the case photos for your model's camera and button openings, especially the Camera Control cutout.
- Test the case fit the day it arrives, while you still have the box and every insert.
How do you find your iPhone model?
Your iPhone model is listed in Settings > General > About, where Apple shows a part number beside the Model Number label. Tap that part number and it switches to the model number, a short code such as A3081 for a US iPhone 16 or A3575 for a US iPhone 17e (Apple Support, "Find the model number of your iPhone, iPad, or iPod touch," 2025).
Next, look the code up on Apple's "Identify your iPhone model" support page, which lists each model's codes, launch year and visual tells such as rear camera count.
A phone that won't switch on still has the number printed on it. Pull the SIM tray on an iPhone 8 or later and read the slot wall nearest the screen. Tray-less models carry it inside the USB-C or Lightning port, also on the screen side, and a flashlight makes the tiny type readable.
Why don't iPhone cases fit across models?
iPhone cases don't fit across models because each case is cut for one phone's body size, camera layout and button positions, and Apple changes at least one of those with nearly every release.
Size changes are small but real: the iPhone 17 is 2.0 mm taller and 0.15 mm deeper than the iPhone 16.
Camera layouts move more. Apple's identification page describes the iPhone 16 and iPhone 17 with two cameras aligned vertically, while the iPhone 17 Pro and iPhone 18 Pro carry three cameras in a plateau that spans the back from side to side. A case cut for one layout covers lenses on the other.
Then come the buttons. The Action button is a programmable button on the upper left of the frame. The iPhone 15 Pro and 15 Pro Max have it, the iPhone 15 and 15 Plus don't, and every iPhone 16 and 17 model has one, including the 16e and 17e. Camera Control, a touch-and-press control on the lower right for the camera, came with the iPhone 16 lineup but isn't on the 16e or 17e (Apple Tech Specs, 2024-2026). A case made for a phone without these controls simply blocks them.
What are the dimensions of each iPhone model?
Apple lists height, width and depth for every iPhone in its Tech Specs, and the seven phones Apple sells in October 2026 all differ on at least one of the three. The table adds ten recent models people still carry.
| iPhone model | Height | Width | Depth | Action button | Camera Control | Sold by Apple (Oct 2026) |
|---|---|---|---|---|---|---|
| iPhone 18 Pro Max | 6.43 in (163.4 mm) | 3.07 in (78.0 mm) | 0.34 in (8.75 mm) | Yes | Yes | Yes |
| iPhone 18 Pro | 5.91 in (150.0 mm) | 2.83 in (71.9 mm) | 0.34 in (8.75 mm) | Yes | Yes | Yes |
| iPhone Duo (folded) | 4.64 in (117.8 mm) | 3.31 in (84.1 mm) | 0.44 in (11.3 mm) | Not listed | Yes | Yes |
| iPhone Air | 6.15 in (156.2 mm) | 2.94 in (74.7 mm) | 0.22 in (5.64 mm) | Yes | Yes | Yes |
| iPhone 17 | 5.89 in (149.6 mm) | 2.81 in (71.5 mm) | 0.31 in (7.95 mm) | Yes | Yes | Yes |
| iPhone 17e | 5.78 in (146.7 mm) | 2.82 in (71.5 mm) | 0.31 in (7.80 mm) | Yes | No | Yes |
| iPhone 16 | 5.81 in (147.6 mm) | 2.82 in (71.6 mm) | 0.31 in (7.80 mm) | Yes | Yes | Yes |
| iPhone 17 Pro Max | 6.43 in (163.4 mm) | 3.07 in (78.0 mm) | 0.34 in (8.75 mm) | Yes | Yes | No |
| iPhone 17 Pro | 5.91 in (150.0 mm) | 2.83 in (71.9 mm) | 0.34 in (8.75 mm) | Yes | Yes | No |
| iPhone 16 Pro Max | 6.42 in (163 mm) | 3.06 in (77.6 mm) | 0.32 in (8.25 mm) | Yes | Yes | No |
| iPhone 16 Pro | 5.89 in (149.6 mm) | 2.81 in (71.5 mm) | 0.32 in (8.25 mm) | Yes | Yes | No |
| iPhone 16 Plus | 6.33 in (160.9 mm) | 3.06 in (77.8 mm) | 0.31 in (7.80 mm) | Yes | Yes | No |
| iPhone 16e | 5.78 in (146.7 mm) | 2.82 in (71.5 mm) | 0.31 in (7.80 mm) | Yes | No | No |
| iPhone 15 Pro Max | 6.29 in (159.9 mm) | 3.02 in (76.7 mm) | 0.32 in (8.25 mm) | Yes | No | No |
| iPhone 15 Pro | 5.77 in (146.6 mm) | 2.78 in (70.6 mm) | 0.32 in (8.25 mm) | Yes | No | No |
| iPhone 15 Plus | 6.33 in (160.9 mm) | 3.06 in (77.8 mm) | 0.31 in (7.80 mm) | No | No | No |
| iPhone 15 | 5.81 in (147.6 mm) | 2.82 in (71.6 mm) | 0.31 in (7.80 mm) | No | No | No |
The iPhone 16 Pro and iPhone 17 rows show why outside size isn't enough: same height, same width, yet the 16 Pro is 0.30 mm thicker and carries three cameras to the 17's two.
Which iPhone models share a case size?
No two iPhone models share an Apple-approved case size, and most generations don't share cases at all because camera bumps and buttons move. Several pairs match on paper, but only one swap is a fair bet.
The iPhone 15 and iPhone 16 are identical on paper at 147.6 x 71.6 x 7.80 mm, as are the 15 Plus and 16 Plus. Don't swap their cases. The iPhone 16 models add the Action button and Camera Control, and a 15 case covers both.
The iPhone 17 Pro and iPhone 18 Pro also match in Apple's specs, as do the two Pro Max models. According to John Gruber of Daring Fireball, writing in September 2026, Apple told him the pair isn't case-compatible because the 18 Pro's camera plateau is a bit thicker. Nobody agrees on how much: Gruber measured about 0.1 mm, and Macworld reported closer to 0.5 mm. His old 17 Pro cases went on fine, while case makers disagree with each other. I'd still buy one that names your phone.
The iPhone 16e and iPhone 17e come closest. Both measure 146.7 x 71.5 x 7.80 mm with one rear camera and matching buttons, and AppleInsider reported in March 2026 that a 16e case goes straight onto a 17e. Charging is where they part ways. Apple lists only Qi for the 16e and MagSafe for the 17e, so a 16e case has no magnets for MagSafe accessories. MagSafe Cases Explained covers what that magnet ring does.
What happens if you order the wrong case size?
A wrong-size case goes back for a refund when you request the return within 14 days of receiving it and the case is unused, in the condition you received it and in its original packaging. Those are the terms at ATBT Daily, an online store for glaze-style glass iPhone cases, vegan leather cases and crossbody phone bags.
Return shipping is on you. Once the store approves the return, the refund lands on your original payment method within 5 business days. Request it first through the store's Contact page, since parcels mailed back without a request get turned away.
Don't try to squeeze a glass case onto the wrong phone to see if it'll work. The glaze product pages warn: "The material of this case requires careful handling and should not be bent."
Does a Pro case fit a non-Pro iPhone?
No, a Pro case doesn't fit the standard iPhone from the same year. The iPhone 17 Pro is 0.80 mm thicker than the iPhone 17 and has a full-width camera plateau, so its case sits loose on an iPhone 17 with the wrong lens openings. A loose case also moves its raised edges away from the screen and camera, the parts covered in How Phone Cases Protect an iPhone. A standard case won't stretch over a Pro's plateau at all.
Do iPhone Air cases fit other iPhone 17 models?
No, iPhone Air cases fit only the iPhone Air. At 5.64 mm deep and 156.2 mm tall, the Air is thinner than any other iPhone 17 model and sized between the 17 Pro and 17 Pro Max, with a single rear camera. ATBT Daily lists the Air as its own size on cases such as Glaze White Marble, so pick it by name when you browse iPhone Cases.
How do you check the fit when your case arrives?
You check a new case's fit by comparing every opening and edge against the phone before you toss the packaging. Run these checks in order.
- The case's corners sit flush on all four sides, with no lifting edge or gap.
- Camera openings in the case frame every lens and the flash without covering any rim.
- Button covers on the case press the volume buttons, side button and Action button with a clear click.
- The Camera Control cutout in the case lines up, on models that have the control.
- A USB-C cable plugs all the way in through the case's port opening.
Flexible TPU forgives a slightly tight fit, while glass and polycarbonate don't, as Phone Case Materials Compared explains.
FAQ
Is the iPhone 17 the same size as the iPhone 16?
No, the iPhone 17 is 149.6 mm tall and 7.95 mm deep, while the iPhone 16 is 147.6 mm tall and 7.80 mm deep. Both have two vertically aligned cameras, the Action button and Camera Control, but buy the case for your model.
Does a case for a 6.1-inch iPhone fit every 6.1-inch model?
No, screen size doesn't set case size. The iPhone 15 and iPhone 16 measure 147.6 x 71.6 mm, the iPhone 16e and 17e measure 146.7 x 71.5 mm, and of those four, only the iPhone 15 lacks an Action button.
Do you need a new case for the iPhone Duo?
Yes, the iPhone Duo needs a case made for it. Folded, it measures 117.8 x 84.1 x 11.3 mm, and it opens to 164.6 mm wide, a shape no other iPhone shares.
Will an iPhone 16 Pro Max case fit an iPhone 17 Pro Max?
No, an iPhone 16 Pro Max case won't fit an iPhone 17 Pro Max. The 17 Pro Max is 0.50 mm thicker, slightly taller and wider, and has a full-width camera plateau.
Which iPhone models does ATBT Daily make cases for?
Supported models change from case to case, with Rose Quartz running from iPhone XS Max to iPhone 17 Pro Max and Glaze White Marble from iPhone 12 mini to iPhone 17 Pro Max. Pick your exact model in each product's size selector. The Best Sellers page is a quick place to start.
