In big mens sizes for big feet, regular or medium width is most well known. XLfeet feet makes big mens sizes in medium width easy to find. Most of our customers who wear D width boots, shoes, socks, slippers, and sandals for men in sizes 14, 15, 16, 17, 18, 19, and 20 are slender guys, or men who have been going up in size as a result of not finding the wider width their feet actually need in their local shoe or boot store. If you have a half inch or more of extra length in your big mens shoes, it's very likely you're in this camp and could benefit from going down in size and wider in width. If you want help with this, please get your foot measured in your local shoe store and then CALL US! Whether you need size 18, 19, or 12 boots for men, or size 17 and size 18 shoes, this is all we do and we excel at it.