EACH GARMENT MANUFACTURE IS UNIQUE, AND THE SIZING COMPARISON MAY NOT BE EXACT. HOWEVER YOU CAN USE THESE GENERAL SIZE CHARTS TO HELP GAUGE YOUR SIZE IN EACH OF THE SIZING SYSTEMS. 
(ALL MEASUREMENTS ARE IN INCHES)

TOPS

CHAIN STITCH T-SHIRT
WIDTH: XS - 18 / S - 19.5 / M - 20.5 / L - 21.5 / XL - 22.5 / XXL - 24 
LENGTH: XS - 25.5 / S - 27.5 / M - 28.5 / L - 29.5 / XL - 30.5 / XXL - 31.5  
REVERSE PANEL CREWNECK
WIDTH: XS - 21 / S - 22 / M - 23 / L - 24 / XL - 25 / XXL - 27
LENGTH: XS - 24.5 / S - 26.5 / M - 27 / L - 27.5 / XL - 28 / XXL - 29
SLEEVE LENGTH: XS - 24 / S - 25 / M - 26 / L - 26.5 / XL - 27.5 / XXL - 28
WOOL PLAID FLANNEL
WIDTH: XS - 20 / S - 21 / M - 22.5 / L - 23.5 / XL - 25.5 / XXL - 26.5
LENGTH: XS - 25 / S - 27 / M - 28.5 / L - 29 / XL - 31 / XXL - 32
SLEEVE LENGTH: XS - 24 / S - 24 / M - 25.5 / L - 26 / XL - 27 / XXL - 27.5
STAMP L/S
WIDTH: S - 18.5 / M - 20.5 / L - 22.5 / XL - 24.5 / XXL - 26.5
LENGTH: S - 27 / M - 28.5 / L - 30 / XL - 31.5 / XXL - 32.75
SLEEVE LENGTH: S - 23 / M - 24 / L - 25 / XL - 25.5 / XXL - 26 

RETRO TILT T-SHIRT
WIDTH: S - 19.5 / M - 20.5 / L - 21.5 / XL - 23 / XXL - 24.5
LENGTH: S - 27.5 / M - 28.5 / L - 29.5 / XL - 30.5 / XXL - 31.5
ARCH L/S
WIDTH: S - 18.5 / M - 19.5 / L - 21.5 / XL - 23 / XXL - 25
LENGTH: S - 26 / M - 29 / L - 30 / XL - 31.5 / XXL - 32.5
SLEEVE LENGTH: S - 26 / M - 27 / L - 29 / XL - 31.5 / XXL - 33.5
3M SPLIT HOODIE
WIDTH: XS - 19 / S - 20.5 / M - 21.5 / L - 23 / XL - 23.5
LENGTH: XS - 26 / S - 27 / M - 28 / L - 29 / XL - 30
SLEEVE LENGTH: XS - 31 / S - 32.5 / M - 33 / L - 36 / XL - 37
APB COLLAB T-SHIRT
WIDTH: S - 18 / M - 20 / L - 22 / XL - 24 / XXL - 26
LENGTH: S - 27 / M - 29 / L - 31 / XL - 32 / XXL - 33
STAMP T-SHIRT
WIDTH: S - 18.5 / M - 20.5 / L - 22.5 / XL - 24.5 / XXL - 26.5
LENGTH: S - 27 / M - 28.5 / L - 30 / XL - 31.5 / XXL - 32.75
MESH PANEL 1/4 ZIP
WIDTH: S - 23 / M - 24 / L - 25 / XL - 26 / XXL - 27
LENGTH: S - 27 / M - 28 / L - 29 / XL - 29.5 / XXL - 30
SLEEVE LENGTH: S - 34 / M - 35 / L - 36 / XL - 37 / XXL - 38
YEAR ONE L/S
WIDTH: S - 35-37 / M - 38-40 / L - 41-43 / XL - 44-46 / XXL - 47-49
LENGTH: S - 28 / M - 29 / L - 30 / XL - 31 / XXL - 32
SLEEVE LENGTH: S - 34 / M - 35 / L - 36 / XL - 37 / XXL - 38
PREMIER T-SHIRT
WIDTH: S - 18 / M - 20 / L - 22 / XL - 24 / XXL - 26
LENGTH: S - 27 / M - 29 / L - 31 / XL - 32 / XXL - 33
3 PANEL HOODIE
WIDTH: S - 20 / M - 22 / L - 24 / XL - 26 / XXL - 28
LENGTH: S - 26 / M - 27 / L - 28 / XL - 29 / XXL - 30
SLEEVE LENGTH: S - 33 / M - 34 / L - 35 / XL - 36 / XXL - 37

BOTTOMS

DOUBLE KNEE WORK PANT
WAIST: XS - 26-27 / S - 29-30 / M - 31-32 / L - 33-34 / XL - 36 / XXL - 38
FRONT RISE: XS - 9.75 / S - 10.25 / M - 10.75 / L - 11.25 / XL - 11.5 / XXL - 12
BACK RISE: XS - 13.75 / S - 14.25 / M - 14.5 / L - 15 / XL - 15.75 / XXL - 16
LENGTH: XS - 31.5 / S - 31.5 / M - 32 / L - 32 / XL - 33 / XXL - 34
REVERSE PANEL LOUNGE PANT
WAIST: XS - 26-28 / S - 28-30 / M - 31-32 / L - 33-34 / XL - 35-36 / XXL - 38-39
INSEAM: XS - 26.5 / S - 27.5 / M - 29 / L - 30.5 / XL - 31.5 / XXL - 32
REVERSE PANEL SWEATPANT
WAIST: XS - 26-28 / S - 28-30 / M - 31-32 / L - 33-34 / XL - 35-36 / XXL - 38-39
INSEAM: XS - 26.5 / S - 27.5 / M - 29 / L - 30.5 / XL - 31.5 / XXL - 32
SPLIT NYLON SHORT
WAIST (NOT STRETCHED): S - 30 / M - 32 / L - 33 / XL - 34 / XXL - 36
FRONT RISE: S - 11.75 / M - 11.75 / L - 12 / XL - 12.75 / XXL - 12.75
INSEAM: S - 5.5 / M - 5.75 / L - 6 / XL - 6.25 / XXL - 6.5
UTILITY CARGO PANT
WAIST: S - 29-30 / M - 30-31 / L - 32-33 / XL - 36 / XXL - 38
FRONT RISE: S - 11.5 / M - 12.5 / L - 13 / XL - 13.5 / XXL - 14
BACK RISE: S - 16 / M - 16.5 / L - 17 / XL - 17.5 / XXL - 18
LENGTH: S - 29.5 / M - 30 / L - 30 / XL - 31.5 / XXL - 31.5
CARGO TRACK PANT
WAIST: S - 28-30 / M - 31-32 / L - 33-34 / XL - 35-36 / XXL - 37-38
LENGTH: S - 40 / M - 41 / L - 42 / XL - 43 / XXL - 44