Sizing was pretty difficult to figure out but I think it's because of the insulating they put in the c793s. I wore 11W in the standard issue boots you get in basic, but here I had to get 12.5W before they finally fit the same. Not the lightest boots you can get, but definitely the lightest flight approved ones. They break in VERY easily, too.

Bought these C793's a year ago. Ordered W width. Was tight from the start and has never loosen up. Too tight to wear going to have to replace. Otherwise I like these boots very well.

Very good boots, extremely flexible for the protection they offer. Decent grip, comfortable enough to run in, supportive enough to hike with 40lb of gear off-trail in.
Fit is half size shorter than other Kyber styles. (7.5 is 8 in this boot)

-GO READ THE REVIEWS ON THE C693-
Get a half size larger than your normal boots, these run small. The laces are 62" (-ish) but run short. I managed to find a longer set and it makes it easier to put the boots on without having to unlace/relace every time. There's also no pull loop at the back, so there's nothing easy to grab when putting them on.

Much lighter than the 690/790 flight boots, and were great (besides being too small) for a day of paintball in the woods. I'll probably get a proper-sized pair, and second-hand the small set to a friend.

Fantastic customer support. I ordered two pairs of boots. This pair had a slight defect where the sole on one boot was slightlty detached at the toe; minor issue. I sent a note to the company and they Fedex'd out a new pair the SAME day! Outstanding customer service and they 100% stand behind their product. You can't go wrong buying direct from Belleville!