Small

Chest Measurement = 36in - 38in (91cm-96cm) 
Actual Garment Measurement P2P = 21in / 53cm
Side Neck to Hem = 29in / 74cm

Medium
Chest Measurement = 38in - 40in (96cm-101 cm)
Actual Garment Measurement P2P = 22in / 55cm
Side Neck to Hem = 30in / 75cm 

Large
Chest Measurement = 40in - 42in (101cm-106 cm)
Actual Garment Measurement P2P = 23in / 58cm
Side Neck to Hem = 30in / 76cm 

X Large
Chest Measurement = 42in - 44in (106cm-111 cm) 
Actual Garment Measurement P2P = 24in / 60cm
Side Neck to Hem = 31in / 79cm