Vibram Size 28 Mini Lug Heel #5721-5722 (1 Pair) 2-1/2 “.

This Heel Is Made Of A Soft Compound Designed For Comfort And Durability Especially At Low Temperatures, And Has Excellent Resistance To Wear. 12 Iron - 6.4Mm. Use With The 2332 Lug Half Sole.

This one measures closer to 2-5/8” the manufacturer claims it’s a 2-1/2”see pictures.