This tileset was developed specifically for use with GBStudio, where graphics are stored in the system as 8x8 tiles. By using these tiles, one can incorporate a greater variety of tiles into a map without running into the 192-tile limit which Game Boy hardware has.
Well, before making this I already found ways to break that limit (and to use larger tiles), and the resulting games compile fine and even work on real hardware. I made this anyway for those who wish to never exceed 192 tiles, thus keeping their games small in filesize and reducing the likelihood of compiling problems.
Original size: 6pt (use multiples of this size for pixel perfection)