This is my 5th pair of Fitflops.  You can say I am a SIZING EXPERT at this point. I am a true 6 1/2.  I wear Size 6 in FItflops sandals, Size 6 in Women's Mukluk Tall Boots, Size7 in Women's Happy Goh Clog (Size 6 was tad short, 7 tad long), and Big Kid Size 5 (Snug perfect) in Clogs. In This Shearling Clog, I wear Size 7 although it is wide and big.  I hope this helps. ONCE YOU TRY FITFLOPS, YOU JUST DON"T BOTHER WITH ANY OTHER.