I bought both the light and dark boot. I normally wear a 10-1/2 and what I did was ordered one at 10 and the other boot at 10-1/2.  What I realized by ordering Skecher boots in the past is that if they say "Relaxed Fit" then I would highly recommend you get a 1/2 size smaller because over time the boot leather will stretch and then your feet will be "sliding" all over the place.  The size 10 fit perfectly and my feet were happy at the end of the day!