Thank you for viewing. This is a handmade water bottle strap cover. Quilt batting is used between the fabrics to reduce shoulder strain. Size: The width of the part where the strap goes through is about 4.5cm. The width when opened is about 22cm x 13.5cm. #lxdhandmade #lxdhandmadewaterbottlestrapcover ★　Because this is a handmade item, there may be some misalignment or unevenness in the stitching. Thank you for your understanding and purchase (^-^)