This is a set of flexible covers for vernier calipers, it should fit most calipers both digital and otherwise. My hope is that it will reduce damage to the jaws of the calipers. Ideally it would hold the calipers very slightly open but I did not get that design to work. 

I printed this in Fillamentum Flexfill TPU 92A and it retains the calipers very well, the small section at the top is the bit that retains the calipers and it stretches on and off great.

This model does require support and the support can be a little time consuming to remove.