I ordered the Yaya Ankle Strap Pump, and what arrives was actually the Yaz Wedge Pump.

<a data-hook="product-link-linked" class="a-link-normal" href="/FLY-London-Women-s-Yaz-Wedge-Pump/dp/B000YPSIDW/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">FLY London Women's Yaz Wedge Pump</a>

I had been looking at both shoes, and liked them both equally, so although it was kind of bizarre to order one and receive the other, I tried on the pump.

It fits perfectly.  The sizing on the pump is true...the shoes fit great, look great, and I think I'll totally wear these out.

(Yes, I'm keeping the Yaz.)