What Apple Watch sizes are available in 2026

Apple Watch “size” usually refers to case size in millimetres.

That number is the height of the watch case, measured top to bottom. It does not include the band. It also does not directly equal the screen size, although larger cases typically bring a larger display and easier readability.

In 2026, you’ll commonly see these Apple Watch case sizes across current and recent lines:

• 41mm / 45mm (Apple Watch Series era sizing)
• 40mm / 44mm (older, still widely sold via retailers)
• 49mm (Apple Watch Ultra line)

Here’s the breakdown of the case sizes in each modern Apple Watch generation (beyond 2020):

• Apple Watch Series 10 (2024) and beyond – 42/46mm

• Apple Watch Ultra (2022)/Ultra 2 (2023)/Ultra 3 (2025) – 49mm

• Apple Watch SE 2 (2022) – 40/44mm

• Apple Watch Series 9 (2023) – 41/45mm

• Apple Watch Series 8 (2022) – 41/45mm

• Apple Watch Series 7 (2021) – 41/45mm

• Apple Watch Series 6 (2020) – 40/44mm

How to Measure Your Wrist for an Apple Watch Strap

1. Wrap a soft tape or strip of paper around your wrist—where the watch will sit.
2. Keep it snug but not tight (one finger under the tape).
3. Note the measurement in millimetres (mm).

Common wrist ranges:

• 130–160mm: Smaller wrists
• 160–180mm: Medium
• 180–210mm: Larger wrists

Will Bands Fit My Watch Case?

Bands are grouped by case family:

• 38/40/41mm bands work across those cases.
• 42/44/45/49mm bands work across those larger cases. Always double-check compatibility if buying aftermarket straps.

Fit Check: How Tight Should My Apple Watch Strap Be?

Snug enough for sensors to stay against the skin, but not so tight as to leave deep marks or feel uncomfortable after hours. Adjust looser after workouts or when you notice swelling.

Here are more data to know more about your apple watch from apple.com.