Bought the Hiest when it went on sale around BF. Went with size 11 and I usually wear a 10-10.5 in shoes. They are perfect size. I would go up if you're unsure but they're true to size. Could not be happier with the quality for what I paid. I have had a number of high quality work boots (RedWing, Thorogood) before and the quality was on par with these brands (at a better price).
I have worn these boots daily in an office environment for about 2 months now and they've held up great. Also reached out to the company for info on how to maintain the boots. Received a nearly immediate detailed response. Rarely see that in a company.
I will make sure my next pair of boots is from Warfield & Grand. Couldn't be happier.