THIS STYLE RUNS A HALF SIZE LARGE. (i.e. if you are usually a US size 8, we'd recommend ordering a US size 7.5). The Pump is the ultimate boss babe shoe. Its flexible knit fabric hugs your foot for a perfect fit ready for everything the day throws your way. The moment you step into your Pumps, you're guaranteed to own the room, crush your goals, and strut with confidence way beyond the 9-5. Pashion 1.0 heel kits are NOT cross compatible with Pashion 2.0 Shoes. All 1.0 shoes & heel kits are final sale and only available while supplies last.