I bought a Sebago Clovehitch II because the Sperry Billfish was just getting too expensive. Unfortunately the sizing is all wrong on Sebagos. I went to a shoe retailer to try on Sebagos and Sperry's and Sperry's are true to size while Sebagos are huge. At the store we held up one of each that looked the same size heel to toe to compare: the Sebago size 8M matched the Sperry size 10M! How that happens is beyond me. I've always worn 8M in Sperry's and have no idea what size to get in Sebago, which makes it impossible to buy online. I already returned 2 pairs to Amazon...