This is a water bottle strap cover. I made this cover to prevent the strap from digging into your shoulder. It can also be used as a shoulder strap cover for shoulder bags or as a handle cover for eco-bags, etc. Size (outer dimensions) Length 23cm x Width 14cm Folded in three Length 22cm x Width 5cm Inner dimensions 4cm (See image ⑥) It can be used even with water bottles where the shoulder strap cannot be removed. (See image ③) Considering the outer dimensions of the plastic parts used for length adjustment attached to the shoulder strap, it can be used for water bottles with a shoulder strap width of up to about 2.5cm. (See images ④ and ⑤) I have uploaded images for reference of the cover attached to a water bottle shoulder strap, but this is a sale of the shoulder strap cover only. It will be folded in two for shipping, so ironing after arrival is recommended. Please consider your water bottle type and shoulder strap width. This is a handmade item by an amateur. I try to be careful, but please understand that there may be some distortion, pulling, or misalignment. Thank you very much. m(_ _)