Get the ideal fit for every sports fan in your family. All parameters for our NFL, NBA, MLB, NHL, and 2026 World Cup soccer jerseys are detailed in both metric (cm) and imperial (in) standards below.
Size charts serve as general fitting standards for SportsFanFit merchandise. Actual fits may slightly vary across NFL, NBA, MLB, and 2026 World Cup soccer jersey versions. If your measurements fall between two sizes, we recommend selecting the larger size for optimal athletic comfort. Need help? Contact us at jerseyhelp@hotmail.com.
Quantity
Chat with Us： jerseyhelp@hotmail.com.
Secure payments
30-day returns
Shipping & Returns
Free Shipping E77+ |30-Day Returns |Trusted by foothall fans in 50+ countries
Secure Checkout
We take security seriously. All transactions are encrypted and secure. We proudly accept American Express, JCB, Mastercard, and Visa.
International · 2026-2027
2026-2027 Belgium Training Jersey (Red) - Kids (Mertens 14)
Belgium · 2026-2027 · Training · No. 14 · Kids
2026-2027 Belgium Training Jersey (Red) - Kids (Mertens 14) is a fan version football shirt for the 2026-2027 season, produced for kids in a breathable polyester build with a Red colourway. It is a supporter-tier replica rather than a player-issue garment, so the fit runs true to standard sizing and the price stays accessible for everyday wear.
Belgium 2026-2027 training with Mertens 14 printing
Made for kids — see the size table below
Breathable polyester, Red colourway
Custom name and number printing available at checkout
Ships worldwide from our football shirt store
Belgium · 2026-2027
There are current-season shirts, and then there are shirts that mean something. This Belgium jersey from the 2026-2027 season carries Mertens (No. 14)'s name and number — the exact pairing that made that campaign worth remembering.
The Design
Football design is a language, and this shirt speaks it fluently. The 2026-2027 Belgium colorway, the era-correct typography on the back, the clean front — it is the kind of kit that looks considered from every angle.
Fit, Fabric & Details
This is the fan version of the shirt — identical design to the match-day template, cut for real life. The roomier fit and soft-touch knit make it a shirt you actually reach for, whether that is for the stadium, the street, or the sofa on away nights.
Product Specification
Condition
Brand new with tags
Team
Belgium
Season
2026-2027
Player
Mertens — No. 14
Colour
Red
Fit
Youth fit
Fabric
Lightweight breathable polyester
Sleeves
Short sleeve
Print
Heat-bonded name, number and crest
Keeping It Fresh
Care is simple: gentle cold cycle, air dry, no fabric softener. The heat-bonded print and the polyester knit are built to last when heat is kept out of the equation.
Quick Answers Before You Order
+Will this shirt be restocked if my size sells out
Most sold-out sizes return within a few weeks. Contact support to be flagged for the restock of this design — early-notice customers get first access when the shipment lands
+What is the fit like — slim or relaxed
It is an athletic cut — shaped through the shoulders with a slight taper, but comfortable through the torso. If you prefer a boxier retro look, sizing up once gives you exactly that
+I am between two sizes — which should I pick
Size up. A half-size of extra room is barely noticeable, while a shirt that pulls at the chest gets uncomfortable fast. The chart measurements make the final call easy
+Do you have a size chart in inches and centimeters
Yes — the size chart on this page lists chest measurements in inches with centimeter conversions alongside, covering every size from kids small to adult XXL. Sizing in metric or imperial, you can order with confidence
+Is this a good shirt for everyday wear, not just match days
Absolutely — that is honestly how most fans use them. Polyester football shirts double as summer tees, gym tops, and streetwear layering pieces. The breathable fabric and bold colors have made them a year-round wardrobe staple far beyond the stadium
+How do I remove stains from a football shirt
Pre-soak the stained area in cold water with a splash of white vinegar or mild detergent for thirty minutes, then wash as usual. Avoid bleach — it yellows polyester and can leave permanent light patches on club colors
+Is this shirt available in kids and youth sizes
Youth and kids sizes appear in the size selector whenever they are in stock for this design, alongside adult small through XXL. Junior sizes follow the same chest-measurement logic, so a quick check of the chart works for younger fans too
Ready to wear Mertens's name on your back? Pick your size from the selector — and if you would rather have your own name and number, custom printing is one option away at checkout.
2026-2027 Belgium Training Jersey (Red) - Kids (Mertens 14)
Belgium · 2026-2027 · Training · No. 14 · Kids
2026-2027 Belgium Training Jersey (Red) - Kids (Mertens 14) is a fan version football shirt for the 2026-2027 season, produced for kids in a breathable polyester build with a Red colourway. It is a supporter-tier replica rather than a player-issue garment, so the fit runs true to standard sizing and the price stays accessible for everyday wear.
Belgium 2026-2027 training with Mertens 14 printing
Made for kids — see the size table below
Breathable polyester, Red colourway
Custom name and number printing available at checkout
Ships worldwide from our football shirt store
Belgium · 2026-2027
There are current-season shirts, and then there are shirts that mean something. This Belgium jersey from the 2026-2027 season carries Mertens (No. 14)'s name and number — the exact pairing that made that campaign worth remembering.
The Design
Football design is a language, and this shirt speaks it fluently. The 2026-2027 Belgium colorway, the era-correct typography on the back, the clean front — it is the kind of kit that looks considered from every angle.
Fit, Fabric & Details
This is the fan version of the shirt — identical design to the match-day template, cut for real life. The roomier fit and soft-touch knit make it a shirt you actually reach for, whether that is for the stadium, the street, or the sofa on away nights.
Product Specification
Condition
Brand new with tags
Team
Belgium
Season
2026-2027
Player
Mertens — No. 14
Colour
Red
Fit
Youth fit
Fabric
Lightweight breathable polyester
Sleeves
Short sleeve
Print
Heat-bonded name, number and crest
Keeping It Fresh
Care is simple: gentle cold cycle, air dry, no fabric softener. The heat-bonded print and the polyester knit are built to last when heat is kept out of the equation.
Quick Answers Before You Order
+Will this shirt be restocked if my size sells out
Most sold-out sizes return within a few weeks. Contact support to be flagged for the restock of this design — early-notice customers get first access when the shipment lands
+What is the fit like — slim or relaxed
It is an athletic cut — shaped through the shoulders with a slight taper, but comfortable through the torso. If you prefer a boxier retro look, sizing up once gives you exactly that
+I am between two sizes — which should I pick
Size up. A half-size of extra room is barely noticeable, while a shirt that pulls at the chest gets uncomfortable fast. The chart measurements make the final call easy
+Do you have a size chart in inches and centimeters
Yes — the size chart on this page lists chest measurements in inches with centimeter conversions alongside, covering every size from kids small to adult XXL. Sizing in metric or imperial, you can order with confidence
+Is this a good shirt for everyday wear, not just match days
Absolutely — that is honestly how most fans use them. Polyester football shirts double as summer tees, gym tops, and streetwear layering pieces. The breathable fabric and bold colors have made them a year-round wardrobe staple far beyond the stadium
+How do I remove stains from a football shirt
Pre-soak the stained area in cold water with a splash of white vinegar or mild detergent for thirty minutes, then wash as usual. Avoid bleach — it yellows polyester and can leave permanent light patches on club colors
+Is this shirt available in kids and youth sizes
Youth and kids sizes appear in the size selector whenever they are in stock for this design, alongside adult small through XXL. Junior sizes follow the same chest-measurement logic, so a quick check of the chart works for younger fans too
Ready to wear Mertens's name on your back? Pick your size from the selector — and if you would rather have your own name and number, custom printing is one option away at checkout.
