| Size | Forearm Length | Elbow Circumference | Forearm Circumference | Wrist circumference | |||
| S | 21 | 21 | 22 | 15 | |||
| M | 25 | 24 | 25 | 16 | |||
| L | 28 | 27 | 28 | 18 | |||
| XL | 33 | 30 | 38 | 20 |

Jackchains were especially popular during the 15th century. Infantry soldiers who lacked plate armor and instead wore a gambeson, acketon, or other padded arming jacket relied on them most. Paired with a gambeson, jackchains offered an affordable way to protect the arms from stabbing — without restricting movement. Fasten them to your gambeson using laces with aglets, sold separately in several colors. These jackchains are sold in pairs. This armor is 1 mm thick, making it a great fit for LARP battles, theater, cosplay, and costumes.