Boys’ Underwear – AINIAN | Underwear Manufacturer

Comfort Made for Every Little Adventure.

Soft, breathable boys’ underwear developed for growing bodies. Build your collection with flexible fabrics, original designs and reliable OEM, ODM and private-label production.

Size	Suggested Age	Body Height	Waist	Hip
100	3–4 Years	95–105 cm37.4–41.3 in	50–52 cm19.7–20.5 in	56–59 cm22.0–23.2 in
110	4–5 Years	105–115 cm41.3–45.3 in	52–54 cm20.5–21.3 in	59–63 cm23.2–24.8 in
120	6–7 Years	115–125 cm45.3–49.2 in	54–56 cm21.3–22.0 in	63–67 cm24.8–26.4 in
130	8–9 Years	125–135 cm49.2–53.1 in	56–59 cm22.0–23.2 in	67–72 cm26.4–28.3 in
140	10–11 Years	135–145 cm53.1–57.1 in	59–62 cm23.2–24.4 in	72–77 cm28.3–30.3 in
150	12–13 Years	145–155 cm57.1–61.0 in	62–66 cm24.4–26.0 in	77–83 cm30.3–32.7 in
160	14–15 Years	155–165 cm61.0–65.0 in	66–70 cm26.0–27.6 in	83–89 cm32.7–35.0 in
170	15–16 Years	165–175 cm65.0–68.9 in	70–74 cm27.6–29.1 in	89–95 cm35.0–37.4 in

Size

Suggested Age

Body Height

Waist

Hip

100

3–4 Years

95–105 cm37.4–41.3 in

50–52 cm19.7–20.5 in

56–59 cm22.0–23.2 in

110

4–5 Years

105–115 cm41.3–45.3 in

52–54 cm20.5–21.3 in

59–63 cm23.2–24.8 in

120

6–7 Years

115–125 cm45.3–49.2 in

54–56 cm21.3–22.0 in

63–67 cm24.8–26.4 in

130

8–9 Years

125–135 cm49.2–53.1 in

56–59 cm22.0–23.2 in

67–72 cm26.4–28.3 in

140

10–11 Years

135–145 cm53.1–57.1 in

59–62 cm23.2–24.4 in

72–77 cm28.3–30.3 in

150

12–13 Years

145–155 cm57.1–61.0 in

62–66 cm24.4–26.0 in

77–83 cm30.3–32.7 in

160

14–15 Years

155–165 cm61.0–65.0 in

66–70 cm26.0–27.6 in

83–89 cm32.7–35.0 in

170

15–16 Years

165–175 cm65.0–68.9 in

70–74 cm27.6–29.1 in

89–95 cm35.0–37.4 in

International	US	UK / AU	EU	Natural Waist	Hip
XS	0–2	4–6	32–34	61–66 cm24–26 in	86–91 cm34–36 in
S	4–6	8–10	36–38	66–71 cm26–28 in	91–97 cm36–38 in
M	8–10	12–14	40–42	71–76 cm28–30 in	97–102 cm38–40 in
L	12–14	16–18	44–46	76–84 cm30–33 in	102–110 cm40–43 in
XL	16–18	20–22	48–50	84–92 cm33–36 in	110–118 cm43–46 in
2XL	20–22	24–26	52–54	92–102 cm36–40 in	118–128 cm46–50 in
3XL	24–26	28–30	56–58	102–112 cm40–44 in	128–138 cm50–54 in
4XL	28–30	32–34	60–62	112–122 cm44–48 in	138–148 cm54–58 in
5XL	32–34	36–38	64–66	122–132 cm48–52 in	148–158 cm58–62 in

International	US / UK Waist	EU	Natural Waist	Hip / Seat
S	28–30	44–46	71–76 cm28–30 in	88–94 cm35–37 in
M	31–33	48–50	79–84 cm31–33 in	95–101 cm37–40 in
L	34–36	52–54	86–91 cm34–36 in	102–108 cm40–43 in
XL	38–40	56–58	97–102 cm38–40 in	109–115 cm43–45 in
2XL	42–44	60–62	107–112 cm42–44 in	116–122 cm46–48 in
3XL	46–48	64–66	117–122 cm46–48 in	123–129 cm48–51 in
4XL	50–52	68–70	127–132 cm50–52 in	130–136 cm51–54 in
5XL	54–56	72–74	137–142 cm54–56 in	137–143 cm54–56 in

Skilled underwear manufacturing at AINIAN factory

Built by Skilled Hands

Craftsmanship You Can See in Every Stitch.

From accurate cutting to careful sewing and final inspection, our experienced production team treats every detail as part of the product. This disciplined workmanship helps keep fit, finish and quality consistent across samples and bulk orders.

Precise Construction
Consistent Fit
Multi-Stage QC

Talk to Our Production Team

Flexible Material Development

More Fabrics. More Possibilities.

Choose from cotton, modal, lyocell, bamboo viscose and performance blends, or develop a fabric around your target market. Fiber ratio, weight, hand feel, color, stretch and functional finishing can all be adjusted for your collection.

Fiber & Blend
Weight & Hand Feel
Color & Stretch

Customize Your Fabric

AINIAN underwear fabric customization options

Pantone color matching and custom fabric dyeing at AINIAN factory

Custom Color Development

Pantone Color Matching, Made for Your Brand.

Share your Pantone reference or target color with our team. We can develop lab dips, adjust shades on selected fabrics and confirm the color before bulk production, helping your underwear collection stay consistent with your brand identity from sampling to delivery.