The 45mm straps work with 42mm, 44mm, and 49mm cases PLEASE CHECK YOUR WATCH CASE SIZE BEFORE BUYING This strap was made to pay homage tribute to The Decima Flottiglia MAS (Decima Flottiglia Motoscafi Armati Siluranti, also known as La Decima or Xª MAS) (Italian for "10th Assault Vehicle Flotilla") was an Italian flotilla, with commando frogman unit, of the Regia Marina (Italian Royal Navy). Hand-crafted and hand-finished, the Vintage Leather strap is wrought from beautifully soft and supple leather, carefully distressed so as to impart an intricate texture. Material: premium quality Italian leather Thickness: 4MM Length: 125MM+75MM Please note: Any watches pictured are for illustration purposes only and are not included.