Hoka One Anacapa Mid Gore-Tex GTX 1122018-TRYL Men's Hiking Boots Sz. 12 D 6 widths: U.S. Men's Shoe Size Narrow (B/N/C) Medium/Standard(D/M/R) Wide (2E/E/W) 12D (regular), This are D regular most common in 90 % men for Medium/Standard(D/M/R) May run a little big How to Find Your Width Trace each of your feet on a piece of paper on a flat surface. Make sure you trace both of your feet, as your feet could vary in size, and keep the pen/pencil/marker perpendicular to the paper so you don't trace underneath your feet. Determine your width by using a ruler to measure the widest points of your feet. If your widths are different, use the largest measurement to determine your shoe width size.