Trunk doesn't yet support unit measurements so therefore you'll need to convert them to multipliers. For example, if you needed to keep various lengths of fabric synced such as:
you'll need to first create the lowest unit product within Trunk in which all multipliers can still be whole numbers. In this case, it probably makes most sense to use centimeters.
0.5 meters = 50 centimeters
1 meter = 100 centimeters
1 yard ≈ 91 centimeters