On paper, the iPhone 12 Pro Max and the iPhone 13 Pro Max look interchangeable: both have a 6.7-inch display, and their bodies are almost exactly the same size. So if you have a spare 12 Pro Max protector in a drawer, it is natural to wonder whether it will fit your 13 Pro Max. The honest answer is that it will stick, and it will cover most of the screen — but it will not fit properly, and the mismatch sits right at the top of the screen, where it matters most.
This guide explains what actually changed between the two screens, what happens if you fit the wrong protector in either direction, and when “close enough” is acceptable as a stopgap — and when it isn’t.
Key Takeaways
- Both phones have 6.7-inch screens and near-identical dimensions, so a 12 Pro Max protector physically fits onto a 13 Pro Max.
- The 13 Pro Max has a noticeably smaller notch, and its earpiece speaker moved up out of the notch into the top bezel.
- A 12 Pro Max protector’s speaker cutout sits in the wrong place on a 13 Pro Max and can muffle call audio.
- The swap is flawed in the other direction too — a 13 Pro Max protector misaligns with the 12 Pro Max’s wider notch.
- It works as a short-term stopgap, but the correct model-specific protector is the proper fix.
What Actually Changed Between the Two Screens
Start with the similarities, because they are what make this question so tempting. The two phones share the same height and width — 160.8mm by 78.1mm — and both displays measure 6.7 inches. The 13 Pro Max is a fraction thicker (7.65mm against 7.4mm), but that makes no difference to a sheet of glass stuck on the front. The outline of a 12 Pro Max protector lines up with the edges of a 13 Pro Max almost perfectly, which is why it goes on without a fight.
The difference is in the notch. On the 13 Pro Max, Apple shrank the notch by roughly 20 per cent, making it narrower (and a touch deeper) so more screen shows on either side of it. To achieve that, the earpiece speaker was moved out of the notch entirely and relocated to the very top edge of the front, in the bezel above the notch, and the Face ID components were rearranged inside the smaller space. On the 12 Pro Max, the earpiece sits inside that wide notch. Those few millimetres are exactly where protector cutouts live.
Fitting a 12 Pro Max Protector on a 13 Pro Max
The glass itself adheres normally and the edges align, so at first glance everything looks fine. Look closer at the top, though. A full-coverage 12 Pro Max protector is made with a wide notch cutout and a speaker opening positioned for the 12’s earpiece, inside the notch. On the 13 Pro Max, that opening is in the wrong place: the speaker now sits higher, at the top edge, where the old protector may have solid glass — and glass over the earpiece noticeably muffles call audio and speakerphone sound.
The oversized notch window causes cosmetic problems too. Because the cutout is wider than the 13’s notch, thin strips of actual screen are left exposed on either side of it — precisely the areas the notch redesign was meant to free up — and the camera and sensor openings don’t line up as neatly as they should. Protectors with printed black borders show the mismatch worst of all, since the border and cutouts were drawn for a different front panel.
- If you must use a 12 Pro Max protector as a stopgap, pick one with a simple open notch cutout rather than a full-coverage design, hold it over the phone before peeling anything, and confirm the earpiece at the top edge isn’t covered. Make a test call before you commit to it.
The Other Way Round: 13 Pro Max Protector on a 12 Pro Max
The reverse swap is no better. A 13 Pro Max protector has a narrower notch cutout, designed around the smaller notch. Fitted to a 12 Pro Max, that cutout is too small for the wider notch assembly — the glass can overlap the edges of the notch area, and its speaker slot, placed for the 13’s top-edge earpiece, doesn’t match the 12’s earpiece sitting lower, inside the notch. Once again the earpiece risks ending up under solid glass, with the same muffled result.
There is a subtle knock-on effect in both directions: sensor and camera windows that sit slightly off can leave part of a lens or sensor under a printed border or an adhesive edge, and the exposed-versus-covered pattern at the top of the screen simply looks wrong every time you glance at it. None of this harms the phone, but all of it defeats the point of a protector that is supposed to disappear.
The Verdict: Stopgap Yes, Solution No
If your screen is bare today and the only protector you own is the wrong model’s, fitting it is better than fitting nothing — the main display area gets genuine scratch and impact protection, and a day or two of slightly odd looks around the notch costs you nothing. Just check the earpiece isn’t covered, and treat it as temporary.
As a permanent arrangement, it makes little sense. Protectors are designed per model precisely because of details like notch width and speaker placement, and the correct 13 Pro Max protector restores full edge-to-edge coverage, aligned cutouts and clear call audio. When the right one arrives, swap it over — your old protector has done its stopgap duty.
- This near-fit problem repeats across the whole generation: the 12/13 and 12 Pro/13 Pro pairings also share body sizes but not notch designs. Whenever you upgrade within a similar-looking generation, assume the protector is not transferable until you’ve checked the notch and speaker layout.
Frequently Asked Questions
Are the two phones exactly the same size?
Nearly. Height and width are identical, and the 13 Pro Max is just a quarter of a millimetre thicker. That is why the protector sticks and its outline aligns — the differences that break the fit are the smaller notch and the relocated earpiece, not the body.
Will a 12 Pro Max protector damage my 13 Pro Max?
No — there is no physical risk to the phone. The downsides are functional and cosmetic: potentially muffled earpiece audio if the speaker is covered, sensor and camera cutouts that sit slightly off, and strips of screen left exposed beside the narrower notch.
What about cases — do 12 Pro Max cases fit the 13 Pro Max?
Generally no, and this is a stricter problem than the protector. The 13 Pro Max has a larger camera bump and slightly repositioned buttons, so most 12 Pro Max cases either won’t fit or will press on the buttons. Treat protectors as “stopgap-compatible” and cases as not compatible at all.
Same screen size, same body, different details. A 12 Pro Max protector will sit on a 13 Pro Max and protect most of it — but the top few millimetres tell the real story, and they’re why the correct protector exists.
