This saya is designed for gyutos with thinner spines. It fits:
Fujiwara Carbon FKH-10
Fujiwara Stainless FKM-10
Kohetsu CHP-G240 (HAP 40)
Kohetsu KAS-G240 Aogami Super western
Takayuki 07256 Purple
Takayuki Grand Chef Western 10013
**If you are buying a saya for a knife you already have, please note in "Comments" which knife you have so we can check fit.