Complex sentence: Standard-sized cellos are referred to as "full-size" or "4/4" but are also made in smaller (fractional) sizes (e.g.7/8,3/4,1/2,1/4,1/8,1/10,1/16).
Split into simpler sentences: Standard-sized cellos are referred to as "full-size". However, cellos come in smaller (fractional) sizes, from "7/8" and "3/4" down to "1/16" sized cellos (e.g., 7/8,3/4,1/2,1/4,1/8,1/10,1/16).