The phrase "ankle buckle" refers to a situation where the ankle joint weakens or gives way under pressure, causing one's ankle to become unsteady, twist, or collapse. Full definition
Patent upper, Three ankle buckle around your ankle to ensure perfect fit. (kelkoo.co.uk)
SHU CRAZY Womens Ladies Metallic Ankle Buckle Strap Lace Up Open Toe High Heel Stiletto Summer Fashion Sandals Shoes - D58 (UK 7 / EU 40, Gold) (kelkoo.co.uk)
Jimmy Choo New Champagne Gold Satin Strappy Evening Heels Sandals in Box Size IT 36 Satin Glitter Ankle buckle closure Made in Italy Heel height 4» Includes original Jimmy Choo box (1stdibs.com)