My son is 14 years weight 100 pounds what is his size

He'd be between a L and XL, depending on waist size. I'd say L for an average build, XL if waist is larger build. 100 pounds at 14 sounds closer to L though. Hope this helps.

What size is the xlarge youth

I would say size 16. My son wears XL in Nike pants, size 16 dress pants, and wears YXL underwear. Hope this helps!

my grandson wears a size 6 so what size underwear will that be...s,m, l???

Hi, It depends... is he skinny or husky? According to the Under Armour chart, he’d be an XS, but if he’s on the huskier side, get small.

Under Armour Boys Multipack Performance Cotton Boxerjock Brief

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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R966

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Gear up with Under Armour: Performance that moves with you!

MULTIPACK CONVENIENCE - Four pairs per pack means less laundry stress and more ready-to-go essentials.
STAY COOL STAY FRESH - Advanced moisture transport system wicks sweat and dries fast for all-day comfort.
TRUSTED QUALITY STYLE - Under Armour’s signature blend of cotton and performance fabric with a sleek camo design.
MOVE FREELY PERFORM FULLY - 4-way stretch fabric ensures unrestricted motion in every direction.
ATHLETIC FIT ZERO DISTRACTION - Slimmer cut designed for active kids who demand comfort and style.

Under Armour Boys' Multipack Performance Cotton Boxerjock Briefs combine a slim, athletic fit with high-stretch fabric and moisture-wicking technology. This 4-pack offers durable, breathable comfort with a stylish camo pattern, perfect for active kids who need reliable, everyday performance underwear.

Specifications

ASIN	B08VYHL34R
Additional Features	Stretchable
Age Range Description	Big Kid
Apparel Fabric Stretch	High Stretch
Apparel Fabric Weight Class	Lightweight
Best Sellers Rank	#8,295 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #7 in Boys' Boxer Shorts
Bottom Style	Boxers
Brand Name	Under Armour
Care instructions	Machine Wash
Color	Black/Gray Camo
Customer Reviews	4.7 out of 5 stars 8,223 Reviews
Fabric Type	57%COTTON, 38%POLYESTER, 5%SPANDEX
Fabric type	57%COTTON, 38%POLYESTER, 5%SPANDEX
Fit Type	stretch
Fit to Size Sentiment	Positive
Garment Size Country	United States
Import Designation	Imported
Item Type Name	Boxer Briefs
Item Weight	6.72 ounces
Manufacturer	Under Armour
Manufacturer Part Number	25UWFEJ05F-999-PC
Material Type	Polycotton
Number of Items	4
Origin	Imported
Pattern	Camouflage
Product Care Instructions	Machine Wash
Rise Style	Mid
Size	Medium
Style Name	Multipack Performance Cotton Boxerjock Brief
Style Number	25UWFEJ05F-999-PC
Subject Character	Sports
Theme	Sports
UPC	194753818118
Unit Count	4 Count

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