I custom-dyed some TNG collar piping in all three division colors, which are now available on the Tailors Gone Wild web site. 🙂
This piping can be used for the collars on the jumpsuits OR jackets.
All three colors were custom-dyed to closely match screen-used costumes and/or fabric samples.
27″ is plenty for a standard uniform collar, although you’ll need 2 yards for the “Yesterday’s Enterprise” variant (which has collar AND cuffs).