To fit chest measurement
XS/S 30-32” 76-81.5 cm
M 34-36” 86.5-91.5 cm
L 38-40” 96.5-101.5 cm
Finished chest (designed to stretch to fit)
XS/S 29” 73.5 cm
M 32” 81 cm
L 35” 89 cm

Gauge:
Size S: 15 dc and 8 rows = 4” 10 cm with size U.S. G/6 (4 mm) hook
Size M: 13 dc and 7 rows = 4” 10 cm with size U.S. H/8 (5 mm) hook
Size L: 12 dc and 7 rows = 4” 10 cm with U.S. I/9 (5.5 mm) hook