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Boston Red Sox Newborn Alternate Replica Romper Jersey - Red

0-3M-0-3-MO-UD2777
From 4 interest-free payments of $39.78 with Klarna
From 4 interest-free payments of $39.78 with Klarna
$42.90 USD
$59.90 USD
Shipping fees will be calculated at checkout.
Size

Size Guide

 

Sports Fan Gear Size Guide

Standard Measurement Matrix

Find Your Perfect Jersey Fit

Get the ideal fit for every sports fan in your family. All parameters for our NFL, NBA, MLB, NHL, and 2026 World Cup soccer jerseys are detailed in both metric (cm) and imperial (in) standards below.

Baby (0-24M) Kids (2-12Y) Youth (8-16Y) Women's Tops Men's Tops Shorts

Baby Size Guide (0-24 Months)

Designed for newborns to toddlers.

Size Label Age Height (cm) Height (in) Weight (kg) Weight (lbs)
Newborn 0 - 1 month 50 - 56 cm 19.5 - 22" 3 - 5 kg 7 - 11 lbs
0 - 3M 0 - 3 months 56 - 62 cm 22 - 24.5" 5 - 7 kg 11 - 15.5 lbs
3 - 6M 3 - 6 months 62 - 68 cm 24.5 - 27" 7 - 8.5 kg 15.5 - 19 lbs
6 - 9M 6 - 9 months 68 - 74 cm 27 - 29" 8.5 - 9.5 kg 19 - 21 lbs
9 - 12M 9 - 12 months 74 - 80 cm 29 - 31.5" 9.5 - 11 kg 21 - 24 lbs
12 - 18M 12 - 18 months 80 - 86 cm 31.5 - 34" 11 - 12.5 kg 24 - 27.5 lbs
18 - 24M 18 - 24 months 86 - 92 cm 34 - 36" 12.5 - 14 kg 27.5 - 31 lbs

Kids Size Guide (2-12 Years)

Size Label Age Height (cm) Height (in) Chest (cm) Chest (in) Waist (cm) Waist (in)
2T 2 years 86 - 92 cm 34 - 36" 53 cm 21" 51 cm 20"
3T 3 years 92 - 98 cm 36 - 38.5" 55 cm 21.5" 52 cm 20.5"
4T 4 years 98 - 104 cm 38.5 - 41" 57 cm 22.5" 53 cm 21"
5 5 years 104 - 110 cm 41 - 43.5" 59 cm 23" 54 cm 21.5"
6 6 years 110 - 116 cm 43.5 - 45.5" 61 cm 24" 56 cm 22"
7 7 years 116 - 122 cm 45.5 - 48" 63 cm 25" 57 cm 22.5"
8 8 years 122 - 128 cm 48 - 50.5" 66 cm 26" 59 cm 23"
9 - 10 9 - 10 years 128 - 140 cm 50.5 - 55" 69 - 72 cm 27 - 28.5" 62 - 64 cm 24.5 - 25"
11 - 12 11 - 12 years 140 - 152 cm 55 - 60" 76 - 79 cm 30 - 31" 66 - 69 cm 26 - 27"

Youth Size Guide (8-16 Years)

Size Label Age Scale US Size Height (cm) Height (in) Chest (cm) Chest (in) Waist (cm) Waist (in)
XS 7 - 8 Yrs 7 122 - 128 cm 48 - 50" 64 - 67 cm 25 - 26.5" 57 - 59 cm 22.5 - 23"
S 8 - 10 Yrs 8 - 10 128 - 140 cm 50 - 55" 69 - 72 cm 27 - 28.5" 60 - 64 cm 23.5 - 25"
M 10 - 12 Yrs 10 - 12 140 - 152 cm 55 - 60" 74 - 77 cm 29 - 30.5" 65 - 69 cm 25.5 - 27"
L 12 - 14 Yrs 12 - 14 152 - 164 cm 60 - 64.5" 79 - 84 cm 31 - 33" 70 - 75 cm 27.5 - 29.5"
XL 14 - 16 Yrs 14 - 16 164 - 172 cm 64.5 - 68" 86 - 91 cm 34 - 36" 76 - 81 cm 30 - 32"

Women's Shirts & Tops

Size Label US Size UK Size EU Size Bust (cm) Bust (in) Waist (cm) Waist (in)
XS 0 - 2 4 - 6 32 - 34 81 - 84 cm 32 - 33" 61 - 64 cm 24 - 25"
S 4 - 6 8 - 10 36 - 38 86 - 89 cm 34 - 35" 66 - 69 cm 26 - 27"
M 8 - 10 12 - 14 40 - 42 91 - 94 cm 36 - 37" 71 - 74 cm 28 - 29"
L 12 - 14 16 - 18 44 - 46 99 - 102 cm 39 - 40" 79 - 82 cm 31 - 32"
XL 16 - 18 20 - 22 48 - 50 107 - 112 cm 42 - 44" 86 - 91 cm 34 - 36"
XXL 20 - 22 24 - 26 52 - 54 117 - 122 cm 46 - 48" 96 - 102 cm 38 - 40"

Men's Tops & Sports Jerseys

Size Label US Size UK Size EU Size Chest (cm) Chest (in) Waist (cm) Waist (in)
XS 34 34 44 86 - 89 cm 34 - 35" 71 - 74 cm 28 - 29"
S 36 36 46 91 - 94 cm 36 - 37" 76 - 79 cm 30 - 31"
M 38 - 40 38 - 40 48 - 50 96 - 102 cm 38 - 40" 81 - 86 cm 32 - 34"
L 42 42 52 107 - 112 cm 42 - 44" 89 - 94 cm 35 - 37"
XL 44 44 54 117 - 122 cm 46 - 48" 96 - 102 cm 38 - 40"
XXL 46 - 48 46 - 48 56 - 58 127 - 132 cm 50 - 52" 104 - 109 cm 41 - 43"
3XL 50 - 52 50 - 52 60 - 62 137 - 142 cm 54 - 56" 112 - 118 cm 44 - 46"

Shorts Size Guide

Men's Shorts

Size Waist (cm) Waist (in)
XS 71 - 74 cm 28 - 29"
S 76 - 81 cm 30 - 32"
M 84 - 89 cm 33 - 35"
L 91 - 97 cm 36 - 38"
XL 99 - 104 cm 39 - 41"
XXL 107 - 112 cm 42 - 44"

Women's Shorts

Size US Size Waist (cm) Waist (in)
XS 0 - 2 61 - 64 cm 24 - 25"
S 4 - 6 66 - 69 cm 26 - 27"
M 8 - 10 71 - 74 cm 28 - 29"
L 12 - 14 79 - 82 cm 31 - 32"
XL 16 - 18 86 - 91 cm 34 - 36"
Measurement Advice & Fitting Guidance:

Size charts serve as general fitting standards for SportsFanFit merchandise. Actual fits may slightly vary across NFL, NBA, MLB, and 2026 World Cup soccer jersey versions. If your measurements fall between two sizes, we recommend selecting the larger size for optimal athletic comfort. Need help? Contact us at jerseyhelp@hotmail.com.

 
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Boston Red Sox Newborn Alternate Replica Romper Jersey - Red

Matchday isn't a date on the calendar — it's a state of mind. Throw on this Boston Red Sox jersey and you're already halfway to the stadium.

Product Overview & Specifications+
This is a fan-version jersey — cut for comfort, priced for real fans, and made to survive everything from stadium seats to backyard watch parties.

Comfort That Lasts All Matchday

Lightweight, breathable fabric keeps air moving on warm afternoons, whether you're in the stands or pacing the living room through extra time.

Style That Reads from the Parking Lot

The Red colorway stands out in a crowd without trying too hard.

A Fit for Real Fans

A no-fuss silhouette that fits true to size for most fans, with a little extra length so it stays tucked-free.

Built to Hold Up

Reinforced hems and colorfast graphics keep it looking sharp season after season.

Product Highlights & Craftsmanship+

Game night, gym session, or a casual Friday at work — it fits the day, whatever the day brings. Pack it for away trips — nothing beats spotting a fellow Boston Red Sox fan in a foreign city.

Birthday coming up? This is the gift that gets worn all year instead of sitting in a drawer.

Shop with Confidence+
  • Style: replica fan jersey with the alternate look of Boston Red Sox.
  • Fit: sizing; check the size chart for exact chest measurements.

True to size for most fans; if you prefer a looser, game-day layering fit, consider going one size up.

Frequently Asked Questions+

Every size option is listed on the product page, so you can pick with confidence before checkout. What you see is what you get — clear photos, honest sizing, and a fan version described exactly as it is.

Keep it fresh: machine wash cold, inside out, and skip the iron on printed areas.

Need help? Email jerseyhelp@hotmail.com

What size should I get for a throwback look?+
Stick to your usual size for a classic fit; sizing up works if you want the baggy, old-school dugout feel.
What age range does youth sizing cover?+
Youth sizes typically span kids through early teens. Check the size chart measurements — chest width is the best guide for choosing.
What is the return policy?+
If something isn't right, reach out to our support team at jerseyhelp@hotmail.com within the return window and we'll help sort out an exchange or resolution. Full details are on the returns page.
Which season is this jersey from?+
This design belongs to the this season campaign, bringing the current crest and colorway of the team's look.

Your spot in the stands is ready — grab this Boston Red Sox jersey before your size is gone.

Boston Red Sox Newborn Alternate Replica Romper Jersey - Red

Matchday isn't a date on the calendar — it's a state of mind. Throw on this Boston Red Sox jersey and you're already halfway to the stadium.

Product Overview & Specifications+
This is a fan-version jersey — cut for comfort, priced for real fans, and made to survive everything from stadium seats to backyard watch parties.

Comfort That Lasts All Matchday

Lightweight, breathable fabric keeps air moving on warm afternoons, whether you're in the stands or pacing the living room through extra time.

Style That Reads from the Parking Lot

The Red colorway stands out in a crowd without trying too hard.

A Fit for Real Fans

A no-fuss silhouette that fits true to size for most fans, with a little extra length so it stays tucked-free.

Built to Hold Up

Reinforced hems and colorfast graphics keep it looking sharp season after season.

Product Highlights & Craftsmanship+

Game night, gym session, or a casual Friday at work — it fits the day, whatever the day brings. Pack it for away trips — nothing beats spotting a fellow Boston Red Sox fan in a foreign city.

Birthday coming up? This is the gift that gets worn all year instead of sitting in a drawer.

Shop with Confidence+
  • Style: replica fan jersey with the alternate look of Boston Red Sox.
  • Fit: sizing; check the size chart for exact chest measurements.

True to size for most fans; if you prefer a looser, game-day layering fit, consider going one size up.

Frequently Asked Questions+

Every size option is listed on the product page, so you can pick with confidence before checkout. What you see is what you get — clear photos, honest sizing, and a fan version described exactly as it is.

Keep it fresh: machine wash cold, inside out, and skip the iron on printed areas.

Need help? Email jerseyhelp@hotmail.com

What size should I get for a throwback look?+
Stick to your usual size for a classic fit; sizing up works if you want the baggy, old-school dugout feel.
What age range does youth sizing cover?+
Youth sizes typically span kids through early teens. Check the size chart measurements — chest width is the best guide for choosing.
What is the return policy?+
If something isn't right, reach out to our support team at jerseyhelp@hotmail.com within the return window and we'll help sort out an exchange or resolution. Full details are on the returns page.
Which season is this jersey from?+
This design belongs to the this season campaign, bringing the current crest and colorway of the team's look.

Your spot in the stands is ready — grab this Boston Red Sox jersey before your size is gone.

Shop this

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