The phrase "side buckle" refers to a type of fastener or closure that is located on the side of something, like a belt or a shoe. It is used to secure or tighten the item by fastening the buckle on one side. Full definition
Featuring side buckle and expanding panel with pink accents. (kelkoo.co.uk)
Crafted from luxury Italian black suede and leather, these ballerinas feature a pointed toe, a branded insole, a flat leather sole and are finished with an ankle strap with a gemstone embellished gold - tone side buckle fastening for a unique feminine edge. (polyvore.com)
They feature an ankle strap with side buckle closure, pointed toe, a branded insole and a flat sole. (polyvore.com)