Hey, sorry for the late reply.
Thanks for your message :) This tileset uses 8x8 as the other tilesets too. All the sets use a bit different technique than usual Tilesets. The smallest "rocks" are 8x8, and 16x16 are the bigger ones (four 8x8 blocks). The characters in HUGE are also created to fit that sizes.
I can see why this is confusing. I think I will just delete the 8x8 out of that sentence, since it's just important to know that it is compatible. Again - Thanks a lot :)