Richardson Hats Sizing Chart

Size Category	Head Circumference Range (inches)	Examples & Product Lines
XS-SM	Approximately 6½″ – 7″	R-Flex Fitted styles (e.g., sku 110, 495, 585, 585T) – “XS-SM” designation appears in several models
SM-MD	Approximately 7″ – 7¼″	R-Flex Fitted models (e.g., sku 110, 487, 533) – Often provided as the mid-range
LG-XL	Approximately 7⅜″ – 7⅝″	Fitted hats extending into larger head sizes (e.g., some Pro Mesh R-Flex models)
XL	Approximately 7¼″ – 7⅞″	Richardson 112 Extra Large Hats (sku R112XL)
OSFM	Approximately 7″ – 7¾″	Models like the 112 Mid Pro Tactical Trucker Hats use “One Size Fits Most” ranges
Alternate Range	SM: 6½″ – 7 1⁄8″; MD-LG: 7 1⁄8″ – 7 3⁄4″	Found in products like the Richardson Lite R-Flex Performance Stretch Hats

Note: These sizing ranges are based on explicit measurements provided in Richardson’s fitted hat models. Other Richardson styles use adjustable closures and are designed as “One Size Fits Most.”