Adult Number T-Shirt – Ages 15–21

Celebrate milestone birthdays in style with this Adult Number T-Shirt, featuring our exclusive Juniper Red Font Not Found typeface designed in-house at 44 Ideas. Available in numbers 15 to 21, each design combines shiny gold foil with soft black flock detail to create a luxurious tactile finish that's perfect for birthday celebrations, parties and unforgettable milestone moments.

Designed for both men and women, these handmade T-shirts are ideal for celebrating life's biggest birthdays in style.

Bold, playful and designed to celebrate life's special moments.

Why you'll love it

• Exclusive Juniper Red font designed in-house at 44 Ideas
• Shiny gold foil with black flock detail for a luxurious textured finish
• Available in milestone numbers 15–21
• Choice of Unisex or Women's fit
• Choice of White, Heather Grey and Asphalt Grey
• Soft, comfortable 100% cotton T-shirt
• Handmade in the UK

Perfect for

• 15th to 21st birthday celebrations
• Teen and adult milestone birthdays
• Birthday parties and celebrations
• Thoughtful birthday gifts
• Family photos and keepsake memories

Choose Your Design

Select your preferred options before ordering:

• Numbers: 15, 16, 17, 18, 19, 20 or 21
• Fit: Unisex or Women's Cut
• Colours: White, Heather Grey or Asphalt Grey

Fit & Sizing

Adult Unisex Sizing

• Small – Chest 34" (Equivalent to Women's UK Size 12)
• Medium – Chest 38" (Equivalent to Women's UK Size 14)
• Large – Chest 41" (Equivalent to Women's UK Size 16)
• X-Large – Chest 45" (Equivalent to Women's UK Size 18)
• XX-Large – Chest 49" (Equivalent to Women's UK Size 20)

Women's Cut Sizing

• X-Small (UK Size 8) – European 36 / USA Size 4
• Small (UK Size 10) – European 38 / USA Size 6
• Medium (UK Size 12) – European 40 / USA Size 8
• Large (UK Size 14) – European 42 / USA Size 10
• X-Large (UK Size 16) – European 44 / USA Size 12
• XX-Large (UK Size 18) – European 46 / USA Size 14

Please check the size guide before ordering to ensure the best fit.

Fabric & Fit

• 100% cotton
• Soft, breathable and comfortable for everyday wear
• Choice of Unisex or Women's fit
• Oeko-Tex 100 certified fabric

Made to Order

Each T-shirt is handmade to order in the UK. Please allow extra time during busy periods. Small variations are part of the handmade process and add to the individuality of each piece.

Care Instructions

• Machine wash at 30°C
• Turn inside out before washing
• Do not tumble dry
• Iron on the reverse to protect the flock and foil finish

Complete the Collection

Our Juniper Red font is available across the Font Not Found collection, including matching birthday cards, badges, tote bags and accessories for coordinated milestone celebrations.

Why choose 44 Ideas?

• Independent UK small business
• Original Font Not Found designs created in-house
• Handmade quality and attention to detail
• Comfortable, stylish and made to last
• Thoughtfully designed to celebrate life's special moments
• Unique designs you won't find on the high street

Bold, playful and made for celebrating.