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Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast - front and back view
Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast Break Fan - front view
Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast Break Fan - back view
  • Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast - front and back view
  • Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast Break Fan - front view
  • Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast Break Fan - back view
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Cooper Flagg Dallas Mavericks Youth 2025 NBA Draft First Round Pick Fast Break Fan Version Jersey Icon Edition Blue

$39.90 USD
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Size

Size Guide

Everything below is the garment measured flat, not your body. Chest is the full width from armpit seam to armpit seam; length runs from the highest shoulder point down to the hem. Fastest way to get it right: take a jersey that fits you well, measure it the same way, and match the numbers.

Men's / Unisex Big & Tall Authentic (numbered) Youth Preschool / Toddler Women's
Diagram: measure straight across the chest from armpit seam to armpit seam, and from the top of the shoulder down to the hem
ChestLay the jersey flat and measure straight across, from one armpit seam to the other. That full width is the number in the chart - so a chart reading of 44 in means the shirt measures 44 in across, not a 44 in body.
LengthFrom the highest point of the shoulder straight down to the bottom hem, with the jersey laid flat and smoothed out.

Men's / Unisex Jerseys

XS - 5XL

The default cut for most of the store. Loose through the body by design, with a straight hem.

Size Chest (in) Length (in) Chest (cm) Length (cm)
XS 34-36 26 86-91 66
S 38-40 27 97-102 69
M 40-42 28 102-107 71
L 42-44 29 107-112 74
XL 44-46 30 112-117 76
XXL 46-49 31 117-124 79
3XL 49-52 32 124-132 81
4XL 52-56 33 132-142 84
5XL 56-60 34 142-152 86

Big & Tall

1XB - 6XB / XLT - 6XT

Two different things: B sizes add width, T sizes keep the width and add 2-3 in of length. Both are cut from the same shoulders down.

Size Type Chest (in) Length (in) Chest (cm) Length (cm)
1XB Big 46-48 31 117-122 79
2XB Big 50-52 32 127-132 81
3XB Big 54-56 32 137-142 81
4XB Big 58-60 33 147-152 84
5XB Big 62-64 33 157-163 84
6XB Big 66-68 34 168-173 86
MT Tall 40-42 31 102-107 79
LT Tall 42-44 32 107-112 81
XLT Tall 44-46 33 112-117 84
2XT Tall 46-49 34 117-124 86
3XT Tall 49-52 35 124-132 89
4XT Tall 52-56 36 132-142 91
5XT Tall 56-60 37 142-152 94
6XT Tall 60-64 38 152-163 97

Authentic - Numbered Sizing

36 - 64

Some Authentic styles are sold by number instead of letter. The number is the chest width in inches - so a size 48 measures 48 in across. Use the letter column to translate your usual size.

Number Equals Chest (in) Length (in) Chest (cm) Length (cm)
36 XS 36 29 91 74
40 S 40 30 102 76
44 M 44 31 112 79
48 L 48 32 122 81
52 XL 52 33 132 84
56 XXL 56 34 142 86
58 XXL+ 58 34 147 86
60 3XL 60 35 152 89
64 4XL 64 36 163 91

Youth Jerseys

S - XL

Cut in the same shape as the adult shirts, just scaled down. Age is a guide only - chest measurement is the reliable one.

Size Age Chest (in) Length (in) Chest (cm) Length (cm)
S 7-8 yrs 28-30 21 71-76 53
M 9-10 yrs 30-32 23 76-81 58
L 11-12 yrs 32-34 25 81-86 64
XL 13-14 yrs 34-36 26 86-91 66

Preschool & Toddler

2T - 7 / 12M - 24M

Worded by age rather than letter on purpose - this is the range where children grow fastest, so measure a shirt that fits today and match the chest.

Size Age Chest (in) Length (in) Chest (cm) Length (cm)
12M 12-18 mo 18-19 13 46-48 33
18M 18-24 mo 19-20 14 48-51 36
24M 2 yrs 20-21 15 51-53 38
2T 2-3 yrs 20-21 15 51-53 38
3T 3-4 yrs 21-22 17 53-56 43
4T 4-5 yrs 22-23 18 56-58 46
5-6 5-6 yrs 23-25 19 58-64 48
7 7 yrs 25-26 20 64-66 51

Women's Jerseys

W-XS - W-4XL

Listed with a W- prefix so they are easy to spot in the size selector. Narrower through the shoulder and waist than the unisex cut.

Size Chest (in) Length (in) Chest (cm) Length (cm)
W-XS 32-34 25 81-86 64
W-S 34-36 26 86-91 66
W-M 36-38 27 91-97 69
W-L 38-40 27 97-102 69
W-XL 40-42 28 102-107 71
W-XXL 42-45 28 107-114 71
W-3XL 45-48 29 114-122 74
W-4XL 48-51 29 122-130 74
01
Cut for comfort

Basketball jerseys are meant to hang loose. If you want a regular, closer fit, order one size below your usual.

02
Between sizes?

Go up. The extra room is how the cut is designed to be worn, and it layers over a hoodie in winter without pulling.

03
Compare, don't guess

Match the numbers to a shirt you already own rather than to your body. Printed names and numbers on the back do not change the fit.

Numbers are taken flat and can vary by roughly 1 in / 2 cm between styles, and Youth overlaps Preschool at age 7 - in that case Youth S is the slightly longer of the two. Still unsure? Contact us with your height, usual size and the jersey you are looking at, and we will tell you which one to take.
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Description

Youth-cut Dallas Mavericks Blue with Cooper Flagg’s number — as hard-wearing as the kids wearing it.

Nobody buys this to leave it folded. It is a shirt for the schedule, not the shelf. It is the Dallas Mavericks jersey in Blue — and it is unmistakably Cooper Flagg’s. The lettering is sealed on rather than stitched in, so the inside stays smooth against the skin.

The knit carries a moisture-moving finish, so a full game does not turn into a sticky one. No tag in the neck, taping along the seam, and a V-neck that sits flat whatever you wear it with. Between the colour, the cut and the lettering, it covers casual Fridays and playoff nights equally well. Between this and the rest of the Dallas Mavericks range, the palette is consistent enough to mix without thinking. It packs down small, which makes it an easy one to take to an away game.

Key details

  • TeamDallas Mavericks
  • PlayerCooper Flagg
  • RangeYouth
  • ColourBlue
  • BuildSealed graphics on 170 gsm mesh
  • ConferenceWestern

What makes it kid-proof

  • School-day toughHandles the daily wear a favourite shirt gets without complaint.
  • Built for a dateFirst season, birthday, graduation — the personalisation carries the occasion.
  • Genuinely kid-sizedCut in youth proportions, not simply a narrow adult shirt.
  • Grows into practice dutyWhen the next growth spurt lands, it becomes a training shirt instead of clutter.

Common questions

How does the youth cut differ from the adult one?

Same colours and graphics; the body and sleeves are shorter and the proportions are scaled for smaller frames rather than simply narrowed.

Can I order more than one with different names?

Yes — each personalised piece is produced separately, so different names and numbers are fine.

Is it comfortable straight away?

Yes — there is no breaking-in period, and the taped neckline keeps the inside smooth.

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