The Standard Size: The men's underwear briefs is made in Standard American Waist Size, Small=30" - 32"，Medium=33" - 35"，Large=36" - 39"，X-Large=40" - 43"，XX-Large=44" - 47"，3X-Large=48" - 50"，4X-Large=52" - 54"，5X-Large=56" - 58" Innovation of Label: Men's underwear avoid skin irritation caused by the label, we bulid mens briefs underwear with tagless design for much more comfortable wearing experience. Elastic Waistband: Special treatment of 1.37 inch widened elastic waistband is more flexible, wider in width and less roll for men's briefs.And keeps its shape after wash. Mens Briefs Craft：The mens underwear briefs of double needle seams will be more fit and more durable. And one-piece cut in the back to avoid embarrassed adjustment. Traditional Fly: The front adopts double layer design while the fly front with contoured pouch provides support and enough flexible room for men's private area.