From the department of obscure information - I had some swatches of Badalassi cowhide and Shinki horseshide and was cutting 1/4"-in strips from them to make zipper pulls. I stretched a Badalassi strip like you would a rubber band and was surprised how stretchy it was - must have stretched at least 10-15%! Maybe 20. Really stretchy. Shinki, on the other hand, did not stretch almost at all, which may be due it higher density as horsehide, and the fact that the slow tanning process Shinki uses shrinks the hide by up to 30%, making it even denser. Anyway, thought I'd share that (probably not very useful) tidbit.