We are talking about swatches of shoulder or cowhide leather, from other manufacturing.
They are particularly fitted to realize little leather goods, like key-chains or bracialets.
In addition they can be buffer coloured

Variable from 0,5 to 3 sq/ft (1 square foot is 30,48 cm x 30,48 cm)
Thickness: variable from 1 to about 2,2 mm

Natural

Cow leather