Baldric for a late roman spatha?

[Flavivs Aetivs]

The thick baldrics went out of use in the early 4th century. Baldrics were thin, generally no more than 2cm thick, or Spathae were hung from the belt beginning in the 5th century.





The famous diptychs of Honorius and Stilicho are excellent examples.

Length... depends. How long are you? You'll have to measure it yourself, but you should be able to place the baldric underneath your belt so the sword doesn't flop around when marching.