Hello Strjdparel,
Thanks for buying the set and thanks for leaving some feedback - it's a new series so some hickups are expected.
Yes the additional outline makes them form 16x16 to 18x18, I will note this in the ads in future.
The iconset without outlines are delivered as set 00 and set 01.
Set 00 (basic) is on a proper 16x16 grid, set 01 on a 18x18 grid. So no pain there, because both cases are covered.
I also added a set 00-2 which makes the 16x16 versions with a solid black outline, which probably was more what you had in mind. Please let me know if this assumption is correct (download version 1.1)
Refunds can be done via the itch.io system, I can't process them personally as a creator.