Boys' Youth Clothing Size (8-16 Yrs)

  • Women
    • Clothing
      • General Clothing Size
        • US Size
        • UK Size
        • EU Size
        • Australian Size
        • French Size
        • Italian Size
        • Chinese Size
        • Japanese Size
      • Petite Size
        • US Petite Size
        • UK Petite Size
      • Plus Size
        • US Plus Size
        • UK Plus Size
        • EU Plus Size
      • Tall Size
        • Tops & Outerwear
          • US Tall Size Chart
          • UK Tall Size Chart
          • EUR Tall Size Chart
      • Maternity Size
        • US Maternity Size
        • UK Maternity Size
        • European Maternity Size
      • Jeans Size
        • Jeans Waist Size (Inches)
        • Jeans Length (Inseam)
        • US Jeans Size
        • UK Jeans Size
        • EU Jeans Size
        • Japanese Jeans Size
        • Jeans Alpha Size (S-M-L)
        • Jeans Styles
          • Jeans Fit Styles
          • Jeans Length and Rise Styles
          • Low-Waist Jeans Size
      • Leggings Size
        • US Leggings Size
        • UK Leggings Size
        • European Leggings Size
        • Australian Leggings Size
        • Leggings Lengths/Styles
      • Dress Size
        • US Dress Size
        • UK Dress Size
        • European Dress Size
        • Dress Length
      • Skirt Size
        • US Skirt Size
        • UK Skirt Size
        • European Skirt Size
        • Skirt Lengths/Styles
      • Shirt/Blouse Size
        • US Shirt/Blouse Size
        • UK Shirt/Blouse Size
        • EUR Shirt/Blouse Size
        • Sleeve Length Styles
      • T-shirt Size
        • US T-shirt Size
        • UK T-shirt Size
        • European T-shirt Size
    • Shoe Size
      • US Shoe Size
      • UK Shoe Size
      • European Shoe Size
      • Shoe Width
        • US Shoe Width
        • UK Shoe Width
        • European Shoe Width
    • Underwear
      • Bra Size
        • US Bra Size
        • UK Bra Size
        • European Bra Size
        • French Bra Size
        • Italian Bra Size
        • Australian Bra Size
        • Alpha Bra Size (S-M-L)
        • Sports Bra Size
        • Bra Sister Size (Cool stuff!)
      • Panty Size
        • US Panty Size
        • UK Panty Size Chart
        • European Panty Size
        • French Panty Size
        • Australian Panty Size
      • Hosiery Size
        • General Hosiery Size
        • Hosiery Plus Size
    • Swimwear
      • Bikini Size
        • US Bikini Size
        • UK Bikini Size
        • European Bikini Size
        • French Bikini Size
        • Italian Bikini Size
        • Australian Bikini Size
      • Bikini Plus Size
        • US Bikini Plus Size
        • UK Bikini Plus Size
        • European Bikini Plus Size
        • Australian Bikini Plus Size
      • Swimsuit Size
        • General Swimsuit Size
        • Swimsuit Plus Size
          • US Swimsuit Plus Size
          • UK Swimsuit Plus Size
          • European Swimsuit Plus Size
      • Swimwear Plus Size
      • Swim Caps
    • Accessories
      • Belt Size
      • Jewelry Ring Size
        • US Ring Size
        • UK Ring Size
        • Indian Ring Size
        • EU/French/Scandinavian Ring Size
        • German (Russian) Ring Size
        • Spanish/Italian Ring Size
        • Japanese/Chinese/South American Ring Size
        • Ring Size Tips & Trick
      • Glove Size
        • US Glove Size
        • Int'l Glove Size Chart (CM)
      • Hat Size
        • US Hat Size
        • UK Hat Size
        • European Hat Size
        • French Hat Size
        • Int'l Hat Size (S-M-L)
      • Headband Size
      • Sock Size
        • General Sock Size
        • Compression Sock Size
  • Men
    • Clothing
      • Men's Top Size
        • US/UK Top Size
        • European Top Size
        • Japanese Top Size
      • Shirt Size (Dress Shirts)
        • US/UK Shirt Size
        • European Shirt Size
        • Japanese Shirt Size
      • Jacket Size
        • US/UK Jacket Size
        • European Jacket Size
        • Japanese Jacket Size
      • Pants Size
        • US/UK Pants Size
        • European/Int'l Pants Size
      • Jeans Size
        • Jeans Waist Size
        • Jeans Length/Inseam
        • Jeans Fit Styles
        • Jeans Length and Rise Styles
        • Low-Waist Jeans Sizing
      • T-shirt Size
      • Men's Big Size
      • Men's Tall Size
    • Shoe Size
      • US Shoe Size
      • UK Shoe Size
      • European Shoe Size
      • Shoe Width
        • US Shoe Width
        • UK Shoe Width
        • European Shoe Width
    • Accessories
      • Glove Size
        • US Glove Size (Inches)
        • Int'l Glove Size (CM)
      • Hat Size
        • US Hat Size
        • UK Hat Size
        • European Hat Size
        • French Hat Size
        • Int'l Hat Size (S-M-L)
      • Belt Size
      • Tie Length
      • Sock Size
  • Kids
    • Clothing
      • Kids' General Clothing Size
        • Baby/Infant (NB-2 yr)
        • Toddler (2-5 yrs)
        • Children (4-7 yrs)
          • US
          • European/Int'l
        • Youth/Junior (7-16 yrs)
          • Girls
            • Alpha Size (S-M-L)
            • US
            • European/Int'l
          • Boys
            • Alpha Size (S-M-L)
            • US
            • European/Int'l
      • Jeans Size
        • Girls
        • Boys
      • T-shirt Size
        • Toddler/Children T-shirt Size (2-7 yrs)
          • US Size
          • European Size
        • Youth T-Shirt Size
          • Girls
          • Boys
    • Swimwear
      • Baby Toddler Swimwear Size (0-3 yrs)
      • Children's Swimwear Size (3 yrs ->)
        • Girls
        • Boys
    • Shoe Size
      • Baby Shoe Size (NB-3 yrs)
      • Children's Shoe Size (3-6 yrs)
      • Youth/Junior Shoe Size (6-10 yrs)
      • Shoe Size by Age
        • Girls
        • Boys
      • Shoe Width
      • How to Measure Shoe Size (Guide)
    • Accessories
      • Hat Size
      • Glove Size
      • Sock Size
      • Headband Size
  • Interior
    • Bed Sizes
      • ...by Bed Type
        • Infant beds
          • Crib (US)
          • Cot (UK)
          • European Infant Bed
        • Single/Twin Bed Sizes
        • Double/Full Bed Sizes
        • Queen Bed Sizes
        • King Bed Sizes
      • ...by Country/Area
        • US Bed Sizes
        • UK Bed Sizes
        • European Bed Sizes
          • Continental/Mainland EU Bed Sizes
          • Scandinavian/Baltic Bed Sizes
          • Spanish Bed Sizes
          • French Bed Sizes
          • Italian Bed Sizes
          • Portuguese Bed Sizes
        • Australian Bed Sizes
        • Asian Bed Sizes
          • Chinese Bed Sizes
          • Japanese Bed Sizes
          • Thai
        • South American Bed Sizes
        • South African Bed Size
    • Bedding Sizes
      • Sheet Sizes
        • US Sheet Size
        • UK Sheet Size
        • European Sheet Size
      • Duvet/Quilt Size
        • US Duvet/Quilt Size
        • UK Duvet Size
    • Sleeping Bag Size
    • Dining Table Size
      • Rectangular Dining Table Size
      • Round Dining Table Size
    • Tablecloth Size
      • Round Table
      • Rectangular Table
      • Square Table
    • Sofa/Couch Size
    • TV Size (Distance from TV)
  • Sports
    • Baseball
      • Bat Size
        • Adult Baseball Bat Size
        • Kids/Youth Baseball Bat Size
        • Baseball Bat Size by Age
      • Glove Size
        • Baseball Glove Size by Position (Adult)
        • Kids/Youth Baseball Glove Size
      • Baseball Size (Ball Size)
    • Basketball
    • Biking
      • Mountain Bike Size
      • Road Bike Size
      • Hybrid Bike Size
      • City Bike Size
      • Kids Bike Size
    • Tennis
      • Racket Grip Size
      • Racket Length
      • Head Size
      • Racket's Balance
      • Tennis Ball Size
      • Kids/Jr. Racket Size
    • Soccer/Football
      • Ball Size
      • Field Size/Measurements
    • Skateboard
      • Skateboard Size Chart
      • Longboard Size Chart
      • Kids Size Chart
    • Surfing
      • Types of Surfboards
      • Shortboard Size
      • Fish Board Size
      • Funboard Size
      • Longboard Size
      • SUP
    • Snowboard
    • Skiing
      • Alpine Skiing
        • Carving Ski Length
        • Twintip Ski Length
        • Allmountain Ski Length
        • Pole Length
        • Ski Boots (Mondopoints)
          • Women
          • Men
          • Kids
        • Kids
          • Ski Length, Kids
          • Pole Length, Kids
      • Cross Country Skiing
        • Classic Nordic Style
          • Ski Length
          • Pole Length
        • Skate Ski
          • Ski Length
          • Pole Length
        • Kids
          • Ski Length
          • Pole Length
    • Olympic Handball
    • Nordic Walking
      • Nordic Walking Pole Length
      • Nordic Running Pole Length
  • Conversion
    • Women's Conversion
      • General Clothing Size Conversion
      • Jeans
        • US to UK
        • US to EU
        • EU-UK
      • Shoe Size
      • Underwear
        • Bra Size
          • US to UK
          • US to European
          • US to French
          • US to AUS
          • UK to EU
          • UK to French
          • UK to AUS
          • EU to AUS
        • Panty Size
        • Hosiery Size
      • Accessories
      • Hat Size
      • Ring Size
        • US to UK
        • US to EU/French/Scandinavian
        • US to Spanish/Italian/Swiss
        • US to Indian
        • US to Japanese Chinese
        • US to German (Russian)
    • Men's Conversion
      • Top Size
      • Shirt Size
      • Shoe Size
      • Hat Size
    • Kids' Conversion
      • Kids Clothing Conversion
        • Toddler (2-5 yrs)
        • Children (4-7 yrs)
        • Youth/Junior (7-16 yrs)
          • Girls
          • Boys
      • Shoe Size Conversion
        • Baby/Toddler (NB-3 yrs)
        • Children (3-7 yrs)
        • Youth/Junior (6 yrs ->)
Youth Alpha sizes (S-M-L), Boys
Boys' Junior/Youth Clothing Size
The Youth Alpha-size System (S, M, L - small, medium, large) is used world wide. Together with the US size system (age) and the EUR size system (height), it is the most used youth clothing size system internationally. Youth alpha size is used from approx. 7/8 years age and up to around 15/16. Then the men's size system is next. But what youth size is right for your kid? Let us show you...

How to Measure Boys' Youth Size

Determine boys' youth clothing size by body measurements
To determine Alpha Youth Clothing Size, you will need to take three simple body measurements: 1. Height: Body height measured when standing upright against a wall. 2. Waist Measurement: Circumference around boy's waistline (just above the navel/belly button). 3. Chest: Measure circumference aroundt fullest part of chest (under arms).

Alpha Size Chart, Inches:

Boys' General Youth Size by body measurements. All measurements in inches.
SIZE Height Waist Chest
XS 48-50 23.5-24 25-26
S 50-54 24-25.5 26-27
M 54-58 26-27 27-29
L 58-62 27-28.5 29-32
XL 62-67 29-30 32-35
Smaller sizes? See our Children's Size Chart. Larger sizes? See our Men's Size Chart.

Alpha Size Chart, CM:

Boys' General Youth Size by body measurements. All measurements in CM.
SIZE Height Waist Chest
XS 122-128 59-61 64-66
S 128-137 62-65 66-69
M 137-147 65-69 69-75
L 147-158 69-72 75-82
XL 158-170 73-76 82-88
Smaller sizes? See our Children's Size Chart. Larger sizes? See our Men's Size Chart.

Size by Age

We recommend to use body measurements to determine your youth's clothing size. But if you not are able to use these measurements, you can also determine appox. size by using the age:
Size International Age Average
XS 6-8
S 8-10
M 10-12
L 12-13
XL 13-16

Tips, Tricks or Questions?

Have you got tips, tricks or question about boys' youth clothing/boys' youth clothing sizes? Please leave a comment below. Thanks :)

Tag » What Size Is A Youth Medium