Strap Size 20MM Compatible with : GTS 3/ 4-4 (Mini) -GTS 2-2 (Mini) – Bip (Lite) – Bip U-U (Pro)– any watch size 20MM
Strap Size 22MM Compatible with : GTR 2/4/3 (Pro) – Bip 5/ 3 (Pro)- any watch size 22MM