2X Large 43.8-45.7 / 112-116cm

X Large 41.8-43.7"/107-111cm

Large  40-41.7" / 102-106cm 

Medium  37.9-39.8" / 97-101cm 

Small 35.9-37.8"/92-96cm

X small 34.3-35.8"/87-91cm