Sizing Guide

Our sizing runs relaxed across tees, crewnecks, and long-sleeves. The guide below is your starting reference. When in doubt, order your usual size for a relaxed look, or size down for a closer fit.

Measurements below are estimates based on industry-standard relaxed-fit unisex sizing. We're working on full garment measurements for each style — if you need exact numbers before ordering, email us.

Heritage Tees (Tennis Club Heritage T-Shirts, RDOB & RMOB Tees)

6.2 oz combed cotton, garment-dyed, relaxed fit, screen printed.

Size	Chest (in)	Length (in)	Best For
S	35–37	27	Most men 5'5–5'8, 130–150 lbs
M	38–40	28	Most men 5'8–5'11, 150–175 lbs
L	41–43	29	Most men 5'10–6'1, 175–200 lbs
XL	44–46	30	Most men 6'0–6'3, 200–225 lbs
2XL	47–49	31	Most men 6'1+, 225–250 lbs

Heritage Crewnecks (Tennis Club Heritage Crewneck, RDOB Crewneck)

9.5 oz, 80/20 ring-spun cotton/polyester, three-end cotton face fleece, garment-dyed, relaxed fit.

Size	Chest (in)	Length (in)	Best For
M	40–42	27.5	Most men 5'8–5'11, 150–175 lbs
L	43–45	28.5	Most men 5'10–6'1, 175–200 lbs
XL	46–48	29.5	Most men 6'0–6'3, 200–225 lbs
2XL	49–51	30.5	Most men 6'1+, 225–250 lbs

Long Sleeve Tees (RDOB Long Sleeve)

6.1 oz, 100% combed cotton, garment-dyed, relaxed fit, screen printed.

Size	Chest (in)	Length (in)	Sleeve Length (in)
M	38–40	28	24.5
L	41–43	29	25.5
XL	44–46	30	26.5
2XL	47–49	31	27.5

RMOB Boxy Tee (Women's Boxy Fit)

4.5 oz, 100% ring-spun cotton, boxy fit, mid-length.

Size	Chest (in)	Length (in)	Best For
S	36–38	22	Women's size 0–4
M	39–41	22.5	Women's size 6–8
L	42–44	23	Women's size 10–12
XL	45–47	23.5	Women's size 14–16

Caps (Snapback, Tennis Club Caps, RDOB Caps)

All our caps are one-size with adjustable closure. Most are 100% cotton twill with embroidered or woven detail.

The Real Dads Snapback Cap: Structured, 5-panel, classic snapback closure. Fits most adult head sizes.
Tennis Club Cap: Unstructured, six-panel, relaxed profile, pre-curved bill. Fits most adult head sizes.
RDOB / Bed-Stuy Dad Caps: Structured snapback or dad-hat strapback (depending on style).

Totes

Our totes are one-size:

Involved Auntie Tote: 12-oz washed cotton, dimensions 12.5" H x 17" W x 3" D, approx. 650 cubic inches.

How to Measure Yourself

If the chart above is between sizes, here's how to confirm:

Chest: Measure around the fullest part of your chest, under your arms, with the tape level and snug but not tight.
Length: Measure from the highest point of the shoulder (where shoulder meets neck) straight down to the bottom hem.
Sleeve: From the center back of your neck, across your shoulder, down to your wrist with arm slightly bent.

Still Not Sure?

Email us at therealdads@9tofive.com and we'll help you find the right fit. We can also pull exact garment measurements for any specific piece if you ask.