*Compatibility: Suitable for New Series 6 40mm & 4/5 40mm, Series 4 40mm and all Series 3/2/1 38mm including Series 5 (2019), Series 4 (2018) Series 3 (2017), Series 2 (2016)) and Series 1 (2015) make it a great gift for Easy to adjust
*Size: Small size: Approximately suitable for a 5.5-6.3 inch wrist
*Medium size: Approximately suitable for 6.3-7.2 inch wrists
*Large size: Approximately suitable for 7.2-8.1 inch wrists
*Material: Will not pilling or falling off, using high-quality natural stone.
*Design: Retro elegance can be seen everywhere, suitable for any wrist. This 38mm/40mm strap is perfect for pairing with jewelry or clothing.