Flat T-Shirt Company

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Find your fit using body measurements. Choose a guide and your preferred unit below.

Product guide

Measurements Inches Centimeters

Men — UltraModal™ Core Boxer Brief

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Men — UltraModal™ Core Boxer Brief — Inches
Measurement	S	M	L	XL	2XL	3XL	4XL
Natural Waist (in)	29–31	31–33	33–35.5	35.5–38	38–41	41–43	43–46

Swipe or scroll the table to see every size.

Men — UltraModal™ Core Boxer Brief — Centimeters
Measurement	S	M	L	XL	2XL	3XL	4XL
Natural Waist (cm)	73–78	78–83	83–90	90–96	96–104	104–109	109–116

Swipe or scroll the table to see every size.

Women — UltraModal™ FeelFree — Inches
Measurement	XS	S	M	L	XL	2XL	3XL	4XL
Bust (in)	32–34	34–36	36–38	38–40	40–42	42–44	44–46	46–48
Waist (in)	24–26	26–28	28–30.5	30.5–33.5	33.5–36.5	36.5–39.5	39.5–43.5	43.5–46.5
Hips (in)	34–36	36–38	38–40.5	40.5–43.5	43.5–46.5	46.5–49.5	49.5–52.5	52.5–55.5

Swipe or scroll the table to see every size.

Women — UltraModal™ FeelFree — Centimeters
Measurement	XS	S	M	L	XL	2XL	3XL	4XL
Bust (cm)	81–86	86–91	91–96	96–101	101–106	106–111	111–116	116–121
Waist (cm)	60–66	66–71	71–77	77–85	85–92	92–100	100–110	110–118
Hips (cm)	86–91	91–96	96–102	102–110	110–118	118–125	125–133	133–140

Natural waist: Measure around your natural waist with the tape level and comfortably snug.

Hips: Measure around the fullest part of your hips, keeping the tape level.

Bust: Measure around the fullest part of your bust with the tape level.

These guides cover the styles shown above. Check your product's fit and available sizes before choosing.

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