All sized small, but can fit a medium as well. Ultra Soft Cotton-Modal Blend Fabric: This fabric combined the advantages of Cotton and Modal. The cotton material features nature and health, and the modal material features softness and comfort Single-sided Moisture Transported Tech: This men's underwear uses a new innovative material which has moisture management capability. This material can facilitate moisture transfer from the inner side of the fabric to the outside, you always feel dry and fresh next to the skin, while still remaining comfortable, providing freedom of movement and being easy to care for Patented Separate Pouch Tech: Keep men's intimate areas comfortably separated. No constraint, no embarrassing adjustment. Dual pouch construction can reduce skin on skin heat build-up and sustain a dry fresh environment throughout the day Comfysoft and Durable Widened Waistband: High elastic waistband can provide gentle compression without chafing and rolling. Stylish Separatec logo waistband design will bring you a different visual experience No Riding-Up 2.5 Inch Inseam: Separatec's Short Leg Boxer Briefs are manufactured with a 2.5 inch inseam. It can avoid annoying riding up and enable you full day hassle-free wearing experience as well.