Typical Indian size chart for reference;

Men Roundneck T-shirt size chart (in INCHES)

Size

S

M

L

XL

Chest 

19

21

23

24

Length

25

28

29

31

Sleeve length

8

9

9

10

Shoulder

18

20

22

23

Neck width

7.1

7.5

7.9

8.3

Neck drop

2.8

3.0

3.1

3.3

Note: Generally,
Size S corresponds to a 36 CM shirt
Size M corresponds to a 38 CM shirt
Size L corresponds to a 40 CM shirt
Size XL corresponds to a 42 CM shirt
Size XXL corresponds to a 44 CM shirt

Women Roundneck T-shirt size chart (in INCHES)

Size

S

M

L

XL

Bust

17

18

19

20

Waist

16

17

18

19

Hips

18

19

20

21

Back length

21

22

23.5

24