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Youth Jayson Boston Celtics 2025/26 Fast Break Jersey - White

$39.90 USD

$65.77 USD

Size

S (Age 8-10) M (Age 10-12) L (Age 12-13) XL (Age 13-15)

Quantity

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Orders over $49 · 7-15 days tracked

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Hassle-free exchange & refund

Fan-Grade Quality

Stitched crest & premium trims

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Jersey Size Guide by League

Pro Replica Hub

Every league fits differently. Pick your league below to jump straight to its full size chart — every size from XS to 5XL, chest and length in both inches and centimeters, plus a fit note on how each cut actually wears.

Can’t find your size? We’ll sort it out.

If you’re between sizes, unsure which fit to pick, or the size you want is sold out on a style, reach our 24/7 team via FAQ & Support — tell us the style and size you need and we’ll restock it or make it to order as fast as we can.

How to Measure Yourself

Grab a soft tape measure and wear a thin t-shirt. Two numbers are all you need.

Measurement	How to Take It	Why It Matters
Chest	Wrap the tape under your armpits around the fullest part of your chest. Keep it level, snug but not tight.	The #1 sizing number for every league chart below.
Length	Measure from the highest point of your shoulder straight down to where you want the hem to sit.	League cuts vary — hockey and football run longest.

NFL Jersey Sizing — Football Jerseys

NFL fan version jerseys are cut roomy for layering over hoodies on cold gamedays. The shoulders are generous, the sleeves hit mid-bicep, and the body is boxy by design — that is how football jerseys are meant to be worn.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	32-35	81-89	27	69
S	35-37.5	89-95	28	71
M	37.5-41	95-104	29	74
L	41-44	104-112	30	76
XL	44-48.5	112-123	31	79
XXL	48.5-53.5	123-136	32	81
3XL	53.5-58	136-147	33	84
4XL	58-63	147-160	34	86
5XL	63-68	160-173	35	89

How it fits: True to size for most fans. Size up one if you plan to layer a hoodie underneath.

NBA Jersey Sizing — Basketball Jerseys

NBA fan version jerseys are sleeveless with a longer, straight body — the classic on-court cut. Armholes are cut deep so the jersey moves with you, whether you wear it solo in summer or over a t-shirt.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	32-35	81-89	26	66
S	35-37.5	89-95	27	69
M	37.5-41	95-104	28	71
L	41-44	104-112	29	74
XL	44-48.5	112-123	30	76
XXL	48.5-53.5	123-136	31	79
3XL	53.5-58	136-147	32	81
4XL	58-63	147-160	33	84
5XL	63-68	160-173	34	86

How it fits: True to size worn solo. Go one size up for the oversized streetwear look or layering over a tee.

MLB Jersey Sizing — Baseball Jerseys

MLB fan version jerseys are button-up with a relaxed, straight cut. Because the front opens, the fit is more forgiving than a pullover; the back half is where your chest measurement matters.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	32-35	81-89	28	71
S	35-37.5	89-95	29	74
M	37.5-41	95-104	30	76
L	41-44	104-112	31	79
XL	44-48.5	112-123	32	81
XXL	48.5-53.5	123-136	33	84
3XL	53.5-58	136-147	34	86
4XL	58-63	147-160	35	89
5XL	63-68	160-173	36	91

How it fits: True to size. The button front gives 1-2 in of natural give, so there is rarely a need to size down.

NHL Jersey Sizing — Hockey Jerseys

NHL fan version jerseys are the roomiest cut we carry — built for the ice, where players pad up underneath. Extra-long sleeves, a big angular shoulder line, and a hem that drops well below the waist.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	34-37	86-94	29	74
S	37-40	94-102	30	76
M	40-43	102-109	31	79
L	43-46	109-117	32	81
XL	46-50	117-127	33	84
XXL	50-55	127-140	34	86
3XL	55-60	140-152	35	89
4XL	60-65	152-165	36	91
5XL	65-70	165-178	37	94

How it fits: True to size unless you want a closer fit — many fans actually size down in hockey. Layer-friendly even at your normal size.

NCAA Jersey Sizing — College Jerseys

NCAA fan jerseys follow the cut of their pro counterparts — college football jerseys wear like NFL, college basketball wears like NBA, college hockey like NHL. Check which sport your team plays and use that league chart.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	32-35	81-89	27	69
S	35-37.5	89-95	28	71
M	37.5-41	95-104	29	74
L	41-44	104-112	30	76
XL	44-48.5	112-123	31	79
XXL	48.5-53.5	123-136	32	81
3XL	53.5-58	136-147	33	84
4XL	58-63	147-160	34	86
5XL	63-68	160-173	35	89

How it fits: True to size, matching the pro-league cut of the same sport. The chart below covers football and basketball cuts.

Soccer Jersey Sizing — Soccer Jerseys

Soccer fan version jerseys are the slimmest cut we carry — athletic and close to the body, just like the kits on the pitch. There is little room for layering; this is a summer-fit jersey.

Size	Chest (in)	Chest (cm)	Length (in)	Length (cm)
XS	32-35	81-89	26	66
S	35-37	89-94	27	69
M	37-40	94-102	28	71
L	40-43	102-109	29	74
XL	43-47	109-119	30	76
XXL	47-52	119-132	31	79
3XL	52-57	132-145	32	81
4XL	57-62	145-157	33	84
5XL	62-67	157-170	34	86

How it fits: Between sizes, size up — the slim cut has no give. Fans who prefer a looser fit regularly go one size up.

US–EU Size Conversion

Shopping from Europe? Match your usual EU size here.

US Size	XS	S	M	L	XL	XXL	3XL	4XL	5XL
EU Size	44	46	48–50	50–52	52–54	54–56	56–58	58–60	60–62

Fit Tips & FAQ

The four questions our team answers most.

Between two sizes?

Size up. A slightly relaxed jersey always looks intentional; a tight one never does. (Soccer is the one league where sizing up is almost mandatory — the cut is already slim.)

Do fan version jerseys run big or small?

Neither — they run true to size with a relaxed, everyday cut. Player (on-field / on-court) versions are the slim ones.

Do custom stitched jerseys use the same chart?

Yes. Custom names and numbers follow the exact same league chart as stock jerseys — XS through 5XL.

Will my jersey shrink?

Barely — if you wash cold inside out and hang dry. High-heat drying is what shrinks and cracks graphics.

Youth Jayson Boston Celtics 2025/26 Fast Break Jersey - White

There is a version of Boston Celtics fandom that lives outside the stadium. This jersey was made for it - light, wearable and unmistakably Boston Celtics. In short: a fast break Boston Celtics jersey for young supporters, 2025/26.

What you get

Heat-sealed detail that sits flat on the fabric
Recycled Polyester knit with a flat, matte finish

The Fast Break cut

Fast Break is the lighter, roomier basketball build.

Fabric that behaves

The knit is spun for movement: light in the hand, breathable across the back, and quick to dry after a long afternoon in the sun.

Care that keeps it new

Cold machine wash, inside out, then tumble dry low.

Fan version vs on-field version

Fan version: softer knit, roomier fit, lower price.
On-field version: closer cut, firmer fabric, premium price.
Team colours and crest are the same on both.

Version, sizing and what you are buying

This listing is the fast break cut. It carries the same colours and crest as the on-field design, with a softer knit, a more forgiving fit and a lighter price - made for wearing rather than for the tunnel.

Sizes here follow a standard athletic grade for young fans. Compare the chest measurement on the size guide rather than your usual high-street letter.

Specifications

Season	2025/26
Team	Boston Celtics
Version	Fast Break cut
Audience	Youth
Player	Jayson
Fit	Standard athletic cut
Material	Recycled Polyester
Care	Cold machine wash, inside out. Tumble dry low.
Print and finish	Mesh panels for ventilation; heat-sealed detail that sits flat on the fabric
Personalisation	Not offered on this listing
Sleeve	Short sleeve
Neckline	Ribbed crew neck
League	NBA

Frequently asked questions

How does this cut compare to the on-field shirt?

It is a premium supporter cut. The knit is firmer and the fit closer than the fan version, at well below on-field pricing.

What if the size is wrong?

Check the size guide before ordering and keep the tags on if you need to exchange. Sizing is the usual reason for a swap.

Will the print crack or peel?

No, not with normal care. The detail is applied as a flat heat-sealed finish and holds up when you wash cold and dry low.

Should I size up?

Only if you want a looser, layering-friendly fit. Supporters who like to wear a jersey over a hoodie usually take one size up.

Ordering with confidence

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Material and stitching checked before dispatch.

Choose your size above and get the colours on before the next fixture.

Youth Jayson Boston Celtics 2025/26 Fast Break Jersey - White

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Youth Jayson Boston Celtics 2025/26 Fast Break Jersey - White

Youth Jayson Boston Celtics 2025/26 Fast Break Jersey - White

The Fast Break cut

Fabric that behaves

Care that keeps it new

Fan version vs on-field version

Version, sizing and what you are buying

Specifications

Frequently asked questions

Ordering with confidence

Related pages

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