The ultimate wardrobe addition for true Matt Chapman Oakland Athletics supporters looking for comfort and authentic style.
Find the perfect fit for every member of your family. All parameters are detailed in both metric (cm) and imperial (in) standards below.
Designed for newborns to toddlers.
| Size Label | Age | Height (cm) | Height (in) | Weight (kg) | Weight (lbs) |
|---|---|---|---|---|---|
| Newborn | 0 - 1 month | 50 - 56 cm | 19.5 - 22" | 3 - 5 kg | 7 - 11 lbs |
| 0 - 3M | 0 - 3 months | 56 - 62 cm | 22 - 24.5" | 5 - 7 kg | 11 - 15.5 lbs |
| 3 - 6M | 3 - 6 months | 62 - 68 cm | 24.5 - 27" | 7 - 8.5 kg | 15.5 - 19 lbs |
| 6 - 9M | 6 - 9 months | 68 - 74 cm | 27 - 29" | 8.5 - 9.5 kg | 19 - 21 lbs |
| 9 - 12M | 9 - 12 months | 74 - 80 cm | 29 - 31.5" | 9.5 - 11 kg | 21 - 24 lbs |
| 12 - 18M | 12 - 18 months | 80 - 86 cm | 31.5 - 34" | 11 - 12.5 kg | 24 - 27.5 lbs |
| 18 - 24M | 18 - 24 months | 86 - 92 cm | 34 - 36" | 12.5 - 14 kg | 27.5 - 31 lbs |
| Size Label | Age | Height (cm) | Height (in) | Chest (cm) | Chest (in) | Waist (cm) | Waist (in) |
|---|---|---|---|---|---|---|---|
| 2T | 2 years | 86 - 92 cm | 34 - 36" | 53 cm | 21" | 51 cm | 20" |
| 3T | 3 years | 92 - 98 cm | 36 - 38.5" | 55 cm | 21.5" | 52 cm | 20.5" |
| 4T | 4 years | 98 - 104 cm | 38.5 - 41" | 57 cm | 22.5" | 53 cm | 21" |
| 5 | 5 years | 104 - 110 cm | 41 - 43.5" | 59 cm | 23" | 54 cm | 21.5" |
| 6 | 6 years | 110 - 116 cm | 43.5 - 45.5" | 61 cm | 24" | 56 cm | 22" |
| 7 | 7 years | 116 - 122 cm | 45.5 - 48" | 63 cm | 25" | 57 cm | 22.5" |
| 8 | 8 years | 122 - 128 cm | 48 - 50.5" | 66 cm | 26" | 59 cm | 23" |
| 9 - 10 | 9 - 10 years | 128 - 140 cm | 50.5 - 55" | 69 - 72 cm | 27 - 28.5" | 62 - 64 cm | 24.5 - 25" |
| 11 - 12 | 11 - 12 years | 140 - 152 cm | 55 - 60" | 76 - 79 cm | 30 - 31" | 66 - 69 cm | 26 - 27" |
| Size Label | Age Scale | US Size | Height (cm) | Height (in) | Chest (cm) | Chest (in) | Waist (cm) | Waist (in) |
|---|---|---|---|---|---|---|---|---|
| XS | 7 - 8 Yrs | 7 | 122 - 128 cm | 48 - 50" | 64 - 67 cm | 25 - 26.5" | 57 - 59 cm | 22.5 - 23" |
| S | 8 - 10 Yrs | 8 - 10 | 128 - 140 cm | 50 - 55" | 69 - 72 cm | 27 - 28.5" | 60 - 64 cm | 23.5 - 25" |
| M | 10 - 12 Yrs | 10 - 12 | 140 - 152 cm | 55 - 60" | 74 - 77 cm | 29 - 30.5" | 65 - 69 cm | 25.5 - 27" |
| L | 12 - 14 Yrs | 12 - 14 | 152 - 164 cm | 60 - 64.5" | 79 - 84 cm | 31 - 33" | 70 - 75 cm | 27.5 - 29.5" |
| XL | 14 - 16 Yrs | 14 - 16 | 164 - 172 cm | 64.5 - 68" | 86 - 91 cm | 34 - 36" | 76 - 81 cm | 30 - 32" |
| Size Label | US Size | UK Size | EU Size | Bust (cm) | Bust (in) | Waist (cm) | Waist (in) |
|---|---|---|---|---|---|---|---|
| XS | 0 - 2 | 4 - 6 | 32 - 34 | 81 - 84 cm | 32 - 33" | 61 - 64 cm | 24 - 25" |
| S | 4 - 6 | 8 - 10 | 36 - 38 | 86 - 89 cm | 34 - 35" | 66 - 69 cm | 26 - 27" |
| M | 8 - 10 | 12 - 14 | 40 - 42 | 91 - 94 cm | 36 - 37" | 71 - 74 cm | 28 - 29" |
| L | 12 - 14 | 16 - 18 | 44 - 46 | 99 - 102 cm | 39 - 40" | 79 - 82 cm | 31 - 32" |
| XL | 16 - 18 | 20 - 22 | 48 - 50 | 107 - 112 cm | 42 - 44" | 86 - 91 cm | 34 - 36" |
| XXL | 20 - 22 | 24 - 26 | 52 - 54 | 117 - 122 cm | 46 - 48" | 96 - 102 cm | 38 - 40" |
| Size Label | US Size | UK Size | EU Size | Chest (cm) | Chest (in) | Waist (cm) | Waist (in) |
|---|---|---|---|---|---|---|---|
| XS | 34 | 34 | 44 | 86 - 89 cm | 34 - 35" | 71 - 74 cm | 28 - 29" |
| S | 36 | 36 | 46 | 91 - 94 cm | 36 - 37" | 76 - 79 cm | 30 - 31" |
| M | 38 - 40 | 38 - 40 | 48 - 50 | 96 - 102 cm | 38 - 40" | 81 - 86 cm | 32 - 34" |
| L | 42 | 42 | 52 | 107 - 112 cm | 42 - 44" | 89 - 94 cm | 35 - 37" |
| XL | 44 | 44 | 54 | 117 - 122 cm | 46 - 48" | 96 - 102 cm | 38 - 40" |
| XXL | 46 - 48 | 46 - 48 | 56 - 58 | 127 - 132 cm | 50 - 52" | 104 - 109 cm | 41 - 43" |
| Size | Waist (cm) | Waist (in) |
|---|---|---|
| XS | 71 - 74 cm | 28 - 29" |
| S | 76 - 81 cm | 30 - 32" |
| M | 84 - 89 cm | 33 - 35" |
| L | 91 - 97 cm | 36 - 38" |
| XL | 99 - 104 cm | 39 - 41" |
| XXL | 107 - 112 cm | 42 - 44" |
| Size | US Size | Waist (cm) | Waist (in) |
|---|---|---|---|
| XS | 0 - 2 | 61 - 64 cm | 24 - 25" |
| S | 4 - 6 | 66 - 69 cm | 26 - 27" |
| M | 8 - 10 | 71 - 74 cm | 28 - 29" |
| L | 12 - 14 | 79 - 82 cm | 31 - 32" |
| XL | 16 - 18 | 86 - 91 cm | 34 - 36" |
Size charts serve as general fitting standards. Actual cuts may slightly vary across player and fan jersey versions. If your body measurements fall between two sizes, we recommend selecting the larger size for optimal athletic comfort. Need further help? Contact our 24/7 support team.
Complimentary worldwide tracked express shipping. Delivered within 7-15 days straight to your door.
Wrong size or changed your mind? Enjoy peace of mind with our flexible 30-day exchange and return policy.
Transactions are secured via bank-grade tokenized gateway processing powered by Stripe and JCB networks.
We stand firmly by our sports merchandise. Fully covered against any structural or manufacturing defects.
Guaranteed Safe & Secure Checkout. Your data is protected with bank-grade 256-bit SSL encryption.
Size & Fit Guide
Finding the perfect fit is key to comfort, whether you're cheering from the stands or playing on the pitch. Please use the guide below to help you select the best size.
1. Choose Your Fit
Fan Version (Regular Fit): Designed for everyday wear. It has a slightly looser, more relaxed cut. We recommend buying your standard size.
Player/Authentic Version (Athletic Fit): Designed for professional play. It features a tighter, more "fitted" cut. We recommend sizing up if you prefer a less restrictive feel.
2. How to Measure
To find your best fit, take a jersey that you already own and that fits you perfectly, lay it flat on a table, and measure:
Chest Width: Measure from armpit to armpit.
Length: Measure from the highest point of the shoulder to the bottom hem.
3. View Full Size Guide
Not sure which size to choose? Please refer to our complete Size Guide for detailed measurements, conversion charts, and specific fit information to ensure you get the perfect look:
https://www.prokitvault.com/pages/size-guide
Pro-Tips
Loose vs. Snug: If you plan to wear a hoodie or base layer underneath, or if you simply prefer a more relaxed silhouette, always size up.
Custom Jerseys: Please note that personalized jerseys (with names and numbers) cannot be returned due to sizing issues. Please ensure you have checked the size guide carefully before ordering.
At Pro Kit Vault, we stand behind the craftsmanship of our jerseys. We want you to wear your team’s colors with absolute pride and peace of mind.
Not the perfect fit? Changed your mind? No worries. We offer 100% free returns and exchanges within 30 days of delivery with prepaid return labels provided.
We build our gear to last. If you experience any manufacturing defects (such as unraveling stitching or peeling print) within 365 days, we will replace it free of charge.
To qualify for a full refund or a hassle-free exchange within our 30-day window, your returned items must meet the following criteria:
jerseys customized with specific names, numbers, or unique player/patch configurations are printed on-demand and are unique to you. Consequently, customized jerseys cannot be returned or exchanged unless there is a physical manufacturing defect, severe printing error, or shipping mistake on our part.
We’ve simplified our return process to get you back in the game as quickly as possible. Just follow these 4 simple steps:
We build our gear for true fans who play hard. To ensure you shop with ultimate peace of mind, every product purchased from Pro Kit Vault is automatically covered by our industry-leading 365-Day Quality Guarantee.
If your jersey experiences any of the following issues within 365 days of your purchase date, we will send you a brand new replacement or issue a full store credit—no return of the damaged item required:
*Note: This warranty strictly covers manufacturing and material defects. It does not cover damage caused by accidents, improper washing (e.g., using high-heat dryers), pet damage, or natural wear and tear.*
Once your return is received and inspected at our warehouse, we will send you an email confirmation. If approved, your refund will be processed immediately.
The funds will be credited back to your original method of payment (Credit Card, PayPal, etc.). Please allow 5 to 7 business days for the transaction to appear on your bank or credit card statement, depending on your financial institution's processing policies.
Our dedicated fan support team is available 24/7 to help make things right. Reach out to us, and we will get back to you within 12 hours.
Email Customer SupportAt Pro Kit Vault, we are committed to getting you game-day ready. We operate an intelligent logistics framework to deliver your jerseys quickly and safely, wherever you are.
Our sorting centers work tirelessly to pick, quality-check, and pack your gear. Most orders are fully processed and shipped out within 1 to 3 business days.
Partnered with reliable elite air couriers, our shipments take an average of 7 to 15 days to land securely at your doorstep, complete with end-to-end tracking.
To fulfill our brand guarantee of speedy global delivery, Pro Kit Vault manages multiple logistics fulfillment nodes strategically placed across major international hubs.
Once your checkout sequence is completed, our automated routing engine immediately detects your destination coordinates and assigns the shipment to the nearest global warehouse housing your selected sizes. In the event that a specific jersey style or custom size is temporarily out of stock at your local facility, our team will instantly trigger an internal stock transfer from our next nearest backup vault to fulfill and dispatch your order without unnecessary friction.
We understand that anticipation runs high for sports fans. That is why we enforce a strict 1 to 3 business days standard fulfillment window to finalize order packages.
• Standard In-Stock Kits: Dispatched reliably within 24 to 72 hours.
• Personalized/Customized Jerseys: May require up to 3-7 business days, as our senior printing technicians apply specialized precision hot-pressing and custom hand-stitching alignments to ensure professional-grade durability.
*Note: Order processing times may experience subtle extensions during massive global tournament windows, Black Friday peaks, or high-volume festive seasons.*
Our primary shipping networks provide tracked express logistics to over 90 destination countries. Once your package is handed over to the air carrier, standard transit times average **7 to 15 days** globally.
We provide full step-by-step transparency. The moment your parcel crosses our sorting terminal gateway, an automated shipment dispatch alert containing your trackable courier airway bill number will be pushed directly to your registered email address.
While our shipping lines utilize optimized postal lanes to accelerate clearance sequences, international packages cross multi-border legal boundaries.
Deliveries targeting specific countries or remote regions may occasionally face unpredictable logistical delays due to strict local customs processing protocols, border backlogs, or localized agricultural/security random screening routines. These protective clearance procedures are legally governed by the destination nation's border agencies and remain completely outside the jurisdiction and control of Pro Kit Vault. We appreciate your understanding and patience should your package experience a localized customs hold.
It is the buyer's sole responsibility to ensure that the inputted shipping street data, zip codes, and recipient contact numbers are absolute and free of typos. Pro Kit Vault cannot issue refunds or cover carrier return fees if a parcel is rendered lost, undeliverable, or returned to sender due to insufficient or incorrect address entries provided during checkout.
If your tracking code hasn't updated or you need immediate assistance regarding a customs notification, our specialist fan support team is on standby to assist you.
Contact Us Page Email SupportFan Version (Regular Fit): Tailored for casual everyday wear and comfort in the stands. It features embroidered logos/crests and a slightly looser, standard cut. We recommend ordering your normal size.
Player/Authentic Version (Athletic Fit): The exact same high-performance kits worn by the athletes on the pitch. It features a slim, body-contouring fit, lightweight heat-pressed badges, and advanced breathable ventilation meshes. If you prefer a more relaxed fit in this version, we highly recommend sizing up one size.
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