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George Kittle San Francisco 49ers Youth 2025 Rivalries Collection Game Jersey - Black

S-AGE-8-10-HA3169
From 4 interest-free payments of $39.78 with Klarna
From 4 interest-free payments of $39.78 with Klarna
$57.60 USD
$89.90 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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George Kittle San Francisco 49ers Youth 2025 Rivalries Collection Game Jersey - Black

Win or lose, loyalty doesn't take a week off. This San Francisco 49Ers matchday jersey is how you wear that loyalty where everyone can see it.

The Story

This one leans into what fans actually want — the team look, comfortable feel, and a price that makes sense.

01
Comfort That Lasts All MatchdayA breathable knit that balances stretch and structure, moving with you instead of against you.
02
A Fit for Real FansMade for kids who want to look exactly like their heroes, in a cut that holds up to playground action.
03
Built to Hold UpClean team markings, tidy stitching at the seams, and a collar that holds its shape wash after wash.
04
Style That Reads from the Parking LotThe Black colorway stands out in a crowd without trying too hard.
What makes it stand out: This San Francisco 49ers 2025 Rivalries Collection Game Jersey from is an ode to a fanbase that moves more like family. The authentic-style look features an all-black design with classic saloon-style numbers and gold accents representing the franchise's storied legacy.

Wear It

Game night, gym session, or a casual Friday at work — it fits the day, whatever the day brings. Perfect for stadium Saturdays, sports-bar Sundays, and every watch party in between.

Surprise a fellow supporter with their team's colors — add their name and it becomes a keepsake.

The Details

  • Style: fan-version game-day jersey with the matchday look of San Francisco 49Ers.
  • Fit: youth sizing; check the size chart for exact chest measurements.

When in doubt between two sizes, most fans size up for extra comfort over long matchdays.

Care & Questions

Ordering is simple and secure. If anything needs a second look, email us at jerseyhelp@hotmail.com and we'll sort it out. Every size option is listed on the product page, so you can pick with confidence before checkout.

A little care goes a long way — cold wash, air dry, and this jersey stays game-day ready for years.

Need help? Email jerseyhelp@hotmail.com

What's the best size for a layered NFL look?

NFL fan jerseys follow standard US sizing; most fans go one size up when they plan to layer over a hoodie.

Does it have the team crest and markings?

Yes — it features the team's crest and color markings front and center, so your allegiance is clear from any angle.

Is it good for kids and teens?

Absolutely — youth sizing is available with the same team look and detail as the adult version, made to move through games and playgrounds.

Make it yours today — pick your size, hit the checkout, and get ready for kickoff.

George Kittle San Francisco 49ers Youth 2025 Rivalries Collection Game Jersey - Black

Win or lose, loyalty doesn't take a week off. This San Francisco 49Ers matchday jersey is how you wear that loyalty where everyone can see it.

The Story

This one leans into what fans actually want — the team look, comfortable feel, and a price that makes sense.

01
Comfort That Lasts All MatchdayA breathable knit that balances stretch and structure, moving with you instead of against you.
02
A Fit for Real FansMade for kids who want to look exactly like their heroes, in a cut that holds up to playground action.
03
Built to Hold UpClean team markings, tidy stitching at the seams, and a collar that holds its shape wash after wash.
04
Style That Reads from the Parking LotThe Black colorway stands out in a crowd without trying too hard.
What makes it stand out: This San Francisco 49ers 2025 Rivalries Collection Game Jersey from is an ode to a fanbase that moves more like family. The authentic-style look features an all-black design with classic saloon-style numbers and gold accents representing the franchise's storied legacy.

Wear It

Game night, gym session, or a casual Friday at work — it fits the day, whatever the day brings. Perfect for stadium Saturdays, sports-bar Sundays, and every watch party in between.

Surprise a fellow supporter with their team's colors — add their name and it becomes a keepsake.

The Details

  • Style: fan-version game-day jersey with the matchday look of San Francisco 49Ers.
  • Fit: youth sizing; check the size chart for exact chest measurements.

When in doubt between two sizes, most fans size up for extra comfort over long matchdays.

Care & Questions

Ordering is simple and secure. If anything needs a second look, email us at jerseyhelp@hotmail.com and we'll sort it out. Every size option is listed on the product page, so you can pick with confidence before checkout.

A little care goes a long way — cold wash, air dry, and this jersey stays game-day ready for years.

Need help? Email jerseyhelp@hotmail.com

What's the best size for a layered NFL look?

NFL fan jerseys follow standard US sizing; most fans go one size up when they plan to layer over a hoodie.

Does it have the team crest and markings?

Yes — it features the team's crest and color markings front and center, so your allegiance is clear from any angle.

Is it good for kids and teens?

Absolutely — youth sizing is available with the same team look and detail as the adult version, made to move through games and playgrounds.

Make it yours today — pick your size, hit the checkout, and get ready for kickoff.

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