I had to go look the small ones up on-line because I had not seen them before. The 3 biscuits on the left are the normal size 0, 10 and 20 beachwood biscuits. The 3 on the right are the new FF biscuits for smaller work. This is Porter Cable's description of those biscuits: Porter Cable's faceframe biscuits can join material as narrow as 1 1/2 inches wide. FF biscuits are 13mm x 30mm with the strength of full size biscuits. Ideal for small picture frames, box corners, and cabinet faces.
Thanks for introducing me to these.