Double Sword Back Holster - Twin Sword Back Scabbard - Leather

Double Back Hanger - Epic Armoury

Are back scabbards for swords actually viable? - Quora

Leonardo Dual Ninja Swords w/ Back Carrying Scabbard

Dual Sword Back Scabbard Holder Harness Shoulder Strap Faux Leather Cosplay J1O7

Sword Holder Sheath Back Armor Cosplay – Wulfgar Props

This fully adjustable imitation leather harness is designed to fit virtually any size sword whether it's tactical, traditional, European or a wakizashi. The durable shoulder strap adjusts to where you need it so that your sword fits comfortably across your back. The straps to secure your sword can be adjusted from 1 up to 2 1/2 and the harness is 22 1/4 overall. You absolutely need this sheath to carry your sword around because it's more secure than carrying your sword on a belt.

Universal Fully Adjustable Faux Leather Shoulder Harness Sheath for SW

Monster Hunter Sword Carrier - Grommet's Leathercraft

Medieval Men Dual Sword Shoulder Back Sheath Scabbard Holder Warrior PU Leather

Clubwear Halloween Dual Sword Carrying Back Scabbard Holder Harness Back Belt/Pistol Holster

Medieval Men Dual Sword Shoulder Back Sheath Scabbard Holder Warrior PU Leather