frog fastenings means: Sometimes, a Frog Fastening is also known as the ‘Chinese Chinese frog’. They are decorative braidings that fasten garment fronts. The buttons have a loop through the middle and a loop on the bottom. These ‘frogs,’ are a pair of bookends that stand out from either side. Fastenings can be traced back to Ancient China. They were used as brocade on the front of military uniforms from the 17th century. This decorative technique was known as “frogging” at that time. (in Fashion Dictionary)