San Francisco 49ers Men's Brandon Aiyuk Black Rivalries Collection Game Jersey
Size Guide
Pro Football Jersey Size Guide
Ensure your perfect fit for Sunday kickoff. Explore accurate dimensional specs across our men's stadium cuts, women's contoured fits, youth gear, and infant sets. All measurements are provided in inches and centimeters.
🏈 Men's Premium Replica Fan Jerseys
Fit: Relaxed Tailgate BuildEngineered for the ultimate supporter experience. Designed with a standard droptail hem and ample chest room, making it perfect for layering over a hoodie during outdoor games. Order your normal t-shirt size for a relaxed drape, or size down for a sharper, modern silhouette.
| Alpha Size | Numeric Tag | Chest Measurement | Body Length | Estimated Weight |
|---|---|---|---|---|
| S | 40 | 38 – 40" (96 – 102 cm) | 29.5" (75 cm) | 130 – 155 lbs (59 – 70 kg) |
| M | 44 | 41 – 43" (104 – 109 cm) | 30.5" (77 cm) | 155 – 180 lbs (70 – 82 kg) |
| L | 48 | 44 – 46" (112 – 117 cm) | 31.5" (80 cm) | 180 – 205 lbs (82 – 93 kg) |
| XL | 52 | 47 – 49" (119 – 124 cm) | 32.5" (83 cm) | 205 – 230 lbs (93 – 104 kg) |
| 2XL | 56 | 50 – 52" (127 – 132 cm) | 33.5" (85 cm) | 230 – 255 lbs (104 – 115 kg) |
| 3XL | 60 | 53 – 55" (135 – 140 cm) | 34.5" (88 cm) | 255 – 280 lbs (115 – 127 kg) |
⭐ Stitched Vintage & Throwback Classics
Fit: Retro Boxy Heritage CutStep back in time with our meticulously stitched vintage collection. These jerseys replicate historic gridiron patterns featuring heavy-gauge poly-mesh and classic embroidered names. They utilize a slightly boxier, wider shoulder cut reminiscent of 80s and 90s sports apparel.
| Numeric Tag | Standard Size | Chest Circumference | Front Length | Shoulder Width |
|---|---|---|---|---|
| 40 | Small | 39 – 41" (99 – 104 cm) | 30.0" (76 cm) | 19.5" (49.5 cm) |
| 44 | Medium | 42 – 44" (107 – 112 cm) | 31.0" (79 cm) | 20.5" (52 cm) |
| 48 | Large | 45 – 47" (114 – 119 cm) | 32.0" (81 cm) | 21.5" (54.5 cm) |
| 52 | X-Large | 48 – 50" (122 – 127 cm) | 33.0" (84 cm) | 22.5" (57 cm) |
| 56 | 2X-Large | 51 – 53" (130 – 135 cm) | 34.0" (86 cm) | 23.5" (59.5 cm) |
| 60 | 3X-Large | 54 – 56" (137 – 142 cm) | 35.0" (89 cm) | 24.5" (62 cm) |
👚 Women's Tailored Football Apparel
Fit: Feminine Contoured WaistCrafted specifically for female fans, featuring a modified flattering neckline, tapered waist, and adjusted sleeve lengths. For a classic, form-fitting look, choose your regular dress size. If you prefer the trendy, oversized boyfriend fit for game days, we highly recommend sizing up.
| Tag Size | US Dress Size | Bust Measurement | Waist Range | Back Length |
|---|---|---|---|---|
| S | 4 – 6 | 34 – 36" (86 – 91 cm) | 27 – 29" (68 – 74 cm) | 26.0" (66 cm) |
| M | 8 – 10 | 37 – 39" (94 – 99 cm) | 30 – 32" (76 – 81 cm) | 27.0" (69 cm) |
| L | 12 – 14 | 40 – 42" (102 – 107 cm) | 33 – 35" (84 – 89 cm) | 28.0" (71 cm) |
| XL | 16 – 18 | 43 – 45" (109 – 114 cm) | 36 – 38" (91 – 97 cm) | 29.0" (74 cm) |
| 2XL | 20 – 22 | 46 – 48" (117 – 122 cm) | 39 – 41" (99 – 104 cm) | 30.0" (76 cm) |
👦 Youth & Boys Fan Gear (Ages 7–16)
Fit: True-to-Growth SizingPerfectly proportioned for the next generation of passionate supporters. If your young fan is between size brackets or plans to wear long sleeves underneath their jersey during colder months, we suggest opting for the larger size to allow room for growth.
| Youth Size | Suggested Age | Chest Width | Child Height | Target Weight |
|---|---|---|---|---|
| S | 7 – 8 Yrs | 26 – 28" (66 – 71 cm) | 48 – 50" (122 – 128 cm) | 50 – 65 lbs (23 – 29 kg) |
| M | 9 – 11 Yrs | 29 – 31" (74 – 79 cm) | 51 – 56" (130 – 142 cm) | 65 – 85 lbs (29 – 39 kg) |
| L | 12 – 13 Yrs | 32 – 34" (81 – 86 cm) | 57 – 62" (145 – 157 cm) | 85 – 105 lbs (39 – 48 kg) |
| XL | 14 – 16 Yrs | 35 – 37" (89 – 94 cm) | 63 – 67" (160 – 170 cm) | 105 – 125 lbs (48 – 57 kg) |
👶 Infant & Toddler Football Sets
Fit: Comfortable Stretch BuildDesigned for the youngest fans to show their team pride. These sizes often come as sets (jersey + shorts or pants) and feature softer, stretchier fabrics for easy dressing and all-day comfort. Sizing is based primarily on age and child weight.
| Size Tag | Age Range | Child Height | Target Weight |
|---|---|---|---|
| 12M | 9 – 12 Months | 28 – 30" (71 – 76 cm) | 20 – 24 lbs (9 – 11 kg) |
| 18M | 12 – 18 Months | 30 – 32" (76 – 81 cm) | 24 – 28 lbs (11 – 12.5 kg) |
| 24M / 2T | 18 – 24 Months | 32 – 34" (81 – 86 cm) | 28 – 32 lbs (12.5 – 14.5 kg) |
| 3T | 2 – 3 Years | 35 – 38" (89 – 96 cm) | 33 – 36 lbs (15 – 16 kg) |
| 4T | 3 – 4 Years | 39 – 41" (99 – 104 cm) | 37 – 42 lbs (17 – 19 kg) |
🛡️ Shop with Confidence: 30-Day Fit Guarantee
Still unsure about your size? Every order at SportsKit is backed by our straightforward 30-day hassle-free return and exchange policy. We process orders in 2-5 business days, with reliable tracked delivery taking just 7-15 business days. Best of all, enjoy FREE Shipping on all orders over $79! Need assistance? Our support team is ready at jerseyhelp@outlook.com.
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