"I am a loyal Reef wearer and I love these flip flops. Super comfy and fairly true to size. I personally wish Reef would make a half size flip flop as I am normally an 8 in most shoes...and while my foot fits perfectly end to end on the shoe...could look a little short. I did try on the 9's but they were too big and a little wider. If Reef made an 8.5 these would fit me PERFECT! Considering that 8's should likely cover an 8.5 too since they only make whole sizes...I would say that they run a little short, but if you are an 8.5 normally...definitely get the 9!"