X small:
Neck - 21cm
Chest - 37.5cn
Length - 24.5cm
Small:
Neck - 26cm
Chest- 48cm
Length- 27cm 
Long length - 37cm
Medium:
Neck - 34cm
Chest - 57cm
Length - 29cm
Long length - 39cm
Large:
Neck - 39cm
Chest - 66cm
Lemgth - 36cm
All items are cut and made by hand, there might be  around 1cm difference in sizing.