one roll of silk
A traditional unit for measuring silk cloth; 一匹 (いっぴき) here is a counter for bolts or rolls of fabric, not for animals.
絹一匹で着物が一枚仕立てられます。
One roll of silk can make one kimono.
Compound of 絹 (きぬ, 'silk') and 一匹 (いっぴき), a counter for rolls of cloth.