We have two EIAJ plug and jack sets, EIAJ-4 and EIAJ-5. The EIAJ-4 dc plug has 5.5 mm outer diameter, 3.3 inner diameter, a 1.0 center pin, and a shaft length of 19mm. The matching EIAJ jack has an outer diameter of 5.9 mm, 3.0 mm inner diameter, a 1.1 center pin, and a shaft length of 18.5 mm.
The EIAJ-5 plug comes in a size up. The dc plug has measurements of 6.5x1.4x4.3xL20 mm, and the jack has measurements of 6.5x1.4x3.9xL18 mm.