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      Boston Celtics Kelly Green Fast Break Replica jersey, Jaylen Brown, NBA fan version, size S-XXL
      • Boston Celtics Kelly Green Fast Break Replica jersey, Jaylen Brown, NBA fan version, size S-XXL
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      Youth Boston Celtics Jaylen Brown Kelly Green Fast Break Replica Player Jersey - Icon Edition

      $36.80 USD
      $59.90 USD
      Shipping fees will be calculated at checkout.
      Size

      Size Guide

      Accurate Fit • True to Size • Global Standards

      KitElite  Size Guide

      Find your perfect game-day fit. Detailed measurements across Men's, Women's, Youth, and Toddler/Baby retro basketball jerseys.

      Fit Advice for True Fans: Our jerseys follow standard US Athletic sizing.
      • Standard Athletic Fit: Order your usual t-shirt size for a relaxed, authentic athletic look.
      • Layering / Streetwear Style: If you plan to wear your jersey over a hoodie or prefer a roomy 90s throwback vibe, we strongly recommend sizing up one size.
      📏 How to Measure Your Jersey

      For best results, lay a well-fitting jersey or t-shirt flat on a hard surface and measure using a soft tape measure:

      1. Chest Width (Pit-to-Pit):
      Measure straight across the chest from armpit seam to armpit seam. (Multiply by 2 for full chest circumference).
      2. Back Body Length:
      Measure from the highest point of the shoulder seam straight down to the bottom hem of the jersey.

      *Note: Due to manual craftsmanship and elastic fabric, please allow a standard manufacturing variance of 1–3 cm (0.5–1.2 inches).

      🏀 Men's Basketball Jersey Size Chart (Adult S – 3XL)
      Size Numeric Equivalent Chest Circumference Jersey Length Recommended Height Recommended Weight
      S (Small) 36 – 38 40 in / 102 cm 29.5 in / 75 cm 5'5" – 5'7" (165–172 cm) 120–145 lbs (55–65 kg)
      M (Medium) 40 – 42 43 in / 110 cm 30.7 in / 78 cm 5'7" – 5'10" (172–178 cm) 145–170 lbs (65–77 kg)
      L (Large) 44 – 46 46 in / 118 cm 31.9 in / 81 cm 5'10" – 6'1" (178–185 cm) 170–195 lbs (77–88 kg)
      XL (X-Large) 48 – 50 49 in / 125 cm 33.0 in / 84 cm 6'1" – 6'3" (185–190 cm) 195–220 lbs (88–100 kg)
      2XL (XXL) 52 – 54 52 in / 132 cm 34.2 in / 87 cm 6'3" – 6'5" (190–195 cm) 220–245 lbs (100–110 kg)
      3XL (XXXL) 56 55 in / 140 cm 35.4 in / 90 cm 6'5"+ (195+ cm) 245+ lbs (110+ kg)
      🏀 Women's Jersey Size Chart (S – 2XL)

      *Women's jerseys feature tailored bust contours and slightly tapered waistlines for a flattering silhouette.

      Size US Dress Size Bust Circumference Waist Length
      S 4 – 6 34–36 in / 86–91 cm 26–28 in / 66–71 cm 26.5 in / 67 cm
      M 8 – 10 37–39 in / 94–99 cm 29–31 in / 73–78 cm 27.5 in / 70 cm
      L 12 – 14 40–42 in / 101–107 cm 32–34 in / 81–86 cm 28.5 in / 72 cm
      XL 16 – 18 43–45 in / 109–114 cm 35–37 in / 89–94 cm 29.5 in / 75 cm
      2XL 20 46–48 in / 117–122 cm 38–40 in / 96–101 cm 30.5 in / 77 cm
      🏀 Youth & Kids Jersey Size Chart (Age 8 – 16)

      *Designed for school-age basketball players and junior fans. If child is between sizes, select the larger size for room to grow.

      Youth Size Age Reference Chest Circumference Jersey Length Kid's Height
      Youth S 8 – 9 Years 32 in / 81 cm 23.5 in / 60 cm 4'1" – 4'5" (125–135 cm)
      Youth M 10 – 11 Years 34 in / 86 cm 25.0 in / 64 cm 4'5" – 4'9" (135–145 cm)
      Youth L 12 – 13 Years 36 in / 91 cm 26.5 in / 67 cm 4'9" – 5'1" (145–155 cm)
      Youth XL 14 – 16 Years 38 in / 96 cm 28.0 in / 71 cm 5'1" – 5'5" (155–165 cm)
      🏀 Toddler & Infant / Baby Kit Guide (0 – 7 Years)

      *Toddler sets include comfortable matching elastic shorts with soft skin-friendly lining.

      Category Tag Size Age / Months Top Length Chest Circumference Child Height
      Infant / Baby 3M – 6M 3 – 6 Months 13.0 in / 33 cm 20 in / 51 cm 23–26 in (58–66 cm)
      Infant / Baby 12M – 18M 12 – 18 Months 14.5 in / 37 cm 22 in / 56 cm 28–32 in (71–81 cm)
      Toddler 2T / 3T 2 – 3 Years 16.5 in / 42 cm 24 in / 61 cm 33–37 in (84–94 cm)
      Toddler 4T / 5T 4 – 5 Years 18.5 in / 47 cm 26 in / 66 cm 38–43 in (96–109 cm)
      Little Kids 6 / 7 6 – 7 Years 20.5 in / 52 cm 28 in / 71 cm 44–48 in (112–122 cm)

      Still Not Sure About Your Size?

      Tell us your height, weight, and whether you prefer an athletic or oversized streetwear fit. Our customer service team will recommend the exact size for you within 24 hours.

      Ask Fit Support: jerseyhelp@outlook.com
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      • 30-day returns

      Materials & Craftsmanship
      Returns & Size Exchanges
      Care & Wash Guide
      Sustainability & Mindful Production

      Comfort is underrated right up until the third overtime. This Kelly Green Boston Celtics Fast Break Replica was made with those nights in mind.

      The polyester mesh moves air instead of trapping it, so a full game stays comfortable from warmups to the final buzzer.

      The right kit can make a living room feel a lot like an arena.

      Why fans pick this one

      Screen-applied graphics keep the lettering sharp without adding weight. Think game-day layer, road-trip staple, or the gift that lands with a Boston Celtics supporter.

      What is it? A Youth NBA basketball jersey — the Boston Celtics Fast Break Replica in Kelly Green. Who is it for? Supporters who want the on-court look in a comfortable fan cut rather than the player-issue kit.
      Material
      Breathable polyester mesh
      Size range
      S–XXL, standard fan cut
      Dispatch
      Made to order in 3–5 working days
      Returns
      30-day returns on unworn items
      Boston Celtics jerseyJaylen BrownNBA replicakelly green colourwayfan versioncurrent line
      ▸ Size & fit
      Unisex sizing S–XXL. Standard fan cut — true to size for most supporters; size up one to layer over a hoodie.
      ▸ Materials & care
      100% polyester mesh, lightweight and breathable. Wash cold inside out and hang dry — the print will thank you.
      ▸ Who it is for
      Looking for a Boston Celtics Fast Break Replica that handles both game day and everyday wear? This one is designed around that balance.

      FAQ

      ▸ Will the Kelly Green colour fade after washing?
      Not if you follow the care steps. Cold wash inside out and hang dry to keep the colourway sharp through a full season.
      ▸ Is the Kelly Green colourway the home or away kit?
      This is the Icon edition colourway in Kelly Green, part of the Boston Celtics current range.
      ▸ Is this Boston Celtics Fast Break Replica the on-court version?
      No. It is the fan-version build made for supporters — comfortable, breathable, and styled after the team look rather than the player-issue kit.
      ▸ Is the Boston Celtics Fast Break Replica unisex?
      It is cut unisex and listed in Youth sizing. The S–XXL range covers most supporters.

      Comfort is underrated right up until the third overtime. This Kelly Green Boston Celtics Fast Break Replica was made with those nights in mind.

      The polyester mesh moves air instead of trapping it, so a full game stays comfortable from warmups to the final buzzer.

      The right kit can make a living room feel a lot like an arena.

      Why fans pick this one

      Screen-applied graphics keep the lettering sharp without adding weight. Think game-day layer, road-trip staple, or the gift that lands with a Boston Celtics supporter.

      What is it? A Youth NBA basketball jersey — the Boston Celtics Fast Break Replica in Kelly Green. Who is it for? Supporters who want the on-court look in a comfortable fan cut rather than the player-issue kit.
      Material
      Breathable polyester mesh
      Size range
      S–XXL, standard fan cut
      Dispatch
      Made to order in 3–5 working days
      Returns
      30-day returns on unworn items
      Boston Celtics jerseyJaylen BrownNBA replicakelly green colourwayfan versioncurrent line
      ▸ Size & fit
      Unisex sizing S–XXL. Standard fan cut — true to size for most supporters; size up one to layer over a hoodie.
      ▸ Materials & care
      100% polyester mesh, lightweight and breathable. Wash cold inside out and hang dry — the print will thank you.
      ▸ Who it is for
      Looking for a Boston Celtics Fast Break Replica that handles both game day and everyday wear? This one is designed around that balance.

      FAQ

      ▸ Will the Kelly Green colour fade after washing?
      Not if you follow the care steps. Cold wash inside out and hang dry to keep the colourway sharp through a full season.
      ▸ Is the Kelly Green colourway the home or away kit?
      This is the Icon edition colourway in Kelly Green, part of the Boston Celtics current range.
      ▸ Is this Boston Celtics Fast Break Replica the on-court version?
      No. It is the fan-version build made for supporters — comfortable, breathable, and styled after the team look rather than the player-issue kit.
      ▸ Is the Boston Celtics Fast Break Replica unisex?
      It is cut unisex and listed in Youth sizing. The S–XXL range covers most supporters.
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