How to Find Your Size

Unsure which case size option you need?

Simply turn your Apple Watch over and check the technical engraving on the back of the case.

You will find the exact size listed in millimeters (e.g., 45mm or 49mm).

Match your millimeter size with our official compatibility architecture below to ensure a flawless integrated fit

Apple Watch Compatibility & Sizing

📐WRIST CIRCUMFERENCE:

Designed for ultimate daily versatility, AERON Titanium Bands are engineered to comfortably and securely fit wrists ranging from 135mm to 210mm in circumference.

⚙️ PRECISION LINK ADJUSTMENT

Every single band arrives with a complimentary link adjustment tool and a step-by-step manual. You can easily add or remove individual titanium links at home within minutes to achieve the absolute perfect tailored fit for your wrist.

🔲 SELECT 49 / 46 / 45 / 44 / 42 (LARGE):

• Apple Watch Ultra 1, 2, 3 ,4 (49mm) 

• Apple Watch Series 10 & 12 (46mm) 

• Apple Watch Series 7, 8, 9, 10 & 11 (45mm)

• Apple Watch Series 4, 5 & 6 ( 44mm)

• Apple Watch Series 1, 2 & 3 (42mm) 

• Apple Watch SE (44mm) 

🔳 SELECT 42 / 41 / 40 / 38 (SMALL):

• Apple Watch Series 10 & 12 (42mm) 

• Apple Watch Series 7, 8, 9 10 & 11 (41mm)

• Apple Watch Series 4, 5 & 6 (40mm) 

• Apple Watch Series 1, 2 & 3 (38mm)

• Apple Watch SE (40mm)