Hotz Mats have added a new size, 1.75 inch, to the hex sizes they now offer on their felt hex mats.
From their announcement:
We are now able to produce game mats with 1.75 inch hexes. We had a number of requests for this hex size over the last few years and after far too much effort (the shop messed up on their first attempt to produce our print screen, which meant a three week delay) we now can produce game mats with 1.75 inch hexes. There are several games that use 1.75 inch hexes, including the Heroscape tile system.