• Pittsburgh Pirates #21 Pirates 21 Black Retro
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Pittsburgh Pirates #21 Pirates 21 Black Retro Baseball Jersey

Pittsburgh Pirates #21 Pirates 21 Black Retro Baseball Jersey

$49.94 USD
$79.94 USD $49.94 USD
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Premium Baseball Jersey – Cool Base & Flex Base

Step on the field in style. This MLB-inspired jersey is built from moisture-wicking polyester mesh with reinforced stitching – the same construction players trust, ready to ship today.

📸 The mockup shows one style – but this design ships on Men’s Cool Base, Men’s Flex Base, Women’s, and Youth (Boys). Pick your variant, size, and we’ll make it just for you.

What Makes It Hit Different

  • 🎨 Pro-Level Finish – Graphics applied with pressure and heat so they become part of the fabric – no cracking, no peeling.
  • 🧵 Breathable & Cool – Engineered mesh fabric with built-in airflow. Designed for real game-day conditions.
  • 👕 Athletic Cut – Tailored like a real uniform. Cool Base runs classic replica fit; Flex Base hugs closer for authentic performance feel.
  • ⚾ Season After Season – Built to hold up to game days, laundry cycles, and years of wear.

Fabric Breakdown

  • Cool Base (Replica): 100% polyester mesh at ~220g. Traditional loose fit for that stadium-style drape.
  • Flex Base Men’s: 88% polyester, 12% spandex (≈240g). Pro-level stretch for a tailored, performance fit.
  • Women’s: 100% polyester mesh at ≈200g with a contoured silhouette. Youth (Boys): 100% polyester mesh at ≈180g, sized for ages 6–20.
  • Note: Flex Base runs more athletic than Cool Base. If you prefer a looser fit, stick with Cool Base or size up on Flex Base.

Find Your Perfect Fit

Measurements in inches. Jerseys run loose for that authentic fit – when in doubt, go up.

Size Guide — Baseball. All measurements in inches. If between sizes, size up for the classic looser jersey fit.

Men · Cool Base (Replica · ±1.5 in)

Size Chest (in) Waist (in) Length (in)
S 41–43 40–42 28–29
M 44–45 43–44 29.5–30
L 46–47 45–46 30.5–31
XL 48–49 47–48 31.5–32
2XL 50–53 49–52 32.5–33
3XL 54–56 53–55 33.5–34
4XL 58–60 56–58 34.5–35

Men · Flex Base (Authentic · ±1.5 in)

Size Chest (in) Waist (in) Length (in)
S 40–42 39–41 29–30
M 43–44 42–43 30.5–31
L 45–46 44–45 31.5–32
XL 47–49 46–47 32.5–33
2XL 50–53 48–51 33.5–34
3XL 53–55 52–53 34.5–35
4XL 57–59 54–56 35.5–36

Women (±1.2 in)

Size Chest (in) Waist (in) Length (in)
S 34–35 26–27 22–23.5
M 36–37 28–29 23.5–24.5
L 38–40 30–32 24.5–25.5
XL 41.5–42.5 33.5–35.5 25.5–26.5
2XL 43–45 36–38 26.5–27.5

Youth (Boys) (±1.2 in)

Size Age Chest (in) Length (in)
S 6–8 32–33 22–23
M 10–12 34–35 24–25
L 14–16 36–37 26–27
XL 18–20 38–40 28–29

How to measure: Chest — across fullest part relaxed · Waist — ~1 inch above navel · Length — shoulder seam to hem.

Delivery Info

  • ✅ In Stock — Ships: within 1–2 business days.
  • 📦 US Delivery: 3–7 business days.
  • ⚡ US Express Option: 2–4 business days.
  • 🌍 Rest of World: 1–3 weeks.
  • ⚠️ Popular designs: Occasionally restocking takes 1–2 extra days of production before we can ship.

Your jersey ships from stock in 1–2 business days. If a best-seller is temporarily low, a quick 1–2 day production run covers your order before we ship. Check the size chart above for your variant before ordering. We’re here if you have questions.

⚾ See our full lineup at InkThreadWorks.com. Premium jerseys, every single time.

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