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3rd Day | Christian Clothing

He Must Increase (John 3:30) | Premium Unisex Christian T-shirt

He Must Increase (John 3:30) | Premium Unisex Christian T-shirt

Regular price £17.50
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FREE Delivery with any 2+ T-shirts

He Must Increase (John 3:30): A simple yet bold proclamation from John the Baptist, magnifying Jesus. This classy Christian tee uniquely illustrates this famous Bible verse using increasing and decreasing text to add effect.

Represent Jesus in style with this unique Unisex Christian T-shirt designed with a classic fit for men & women alike. This Tee is made of 100% incredibly soft (airlume combed & ring-spun) cotton, preshrunk, fade-resistant & true-to-size. Level up your wardrobe for the Gospel today.


  • God-glorifying
  • 100% Premium (airlume combed + ring-spun) Cotton
  • Unisex fit: Designed for both men & women alike
  • True to size
  • Manufactured in an eco-friendly, ethical & humane way by BELLA+CANVAS® using 100% biodegradable inks and eco-friendly dyes
  • Fade-resistant design
  • Preshrunk to minimise shrinkage


3rd Day's Premium Unisex T-shirts are designed to fit both men & women alike with a classic fit. If you know your size, feel free to go for it. Otherwise, please follow these simple steps to find your size:


When measuring your chest circumference, please ensure that:

  1. You stand up straight with your hands at your sides and measure around the fullest part of your chest, under your arms, and across your shoulder blades.
  2. The tape measure is snug, but not too tight, allowing it to lie flat against your body without squeezing.


Here are the measurements of 3rd Day's T-shirts in inches (see chart below). Note that each T-shirt fits people with a slightly smaller chest size than the T-shirt. This is to allow some space for breathability.

T-shirt Chest Circumference*
36" (Fits chest sizes 32-35")
40" (Fits chest sizes 36-39")
44" (Fits chest sizes 40-43")
48"  (Fits chest sizes 44-47")
52" (Fits chest sizes 48-51")


*Measured around the full circumference of the T-shirt, just under the arms.

These T-shirts come at an ideal length and are made to resist shrinking in the wash! Sizes S through 2XL increase in length by 1 inch increments, ranging from 28 to 32 inches.


To best care for your Christian T-shirt, turn them inside out when machine washing, tumble drying or ironing and use low heat settings.

UPGRADED: 3rd Day's Christian T-shirts have been upgraded for 2024 to Premium BELLA+CANVAS® Tees. These have a high reputation for being super-soft 100% cotton tees with an excellent fit!

Looking for a gift? Christian clothing is an excellent gift idea for Christian men & women alike. Check out The Christian T-shirt Gift Card to conveniently offer the recipient what suits them best.

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What quality can I expect?

3rd Day's Premium Unisex Christian T-shirts are crafted from incredibly soft airlume combed and ring-spun cotton for optimal comfort and durability. Each T-shirt is expertly printed using high-resolution DTG (Direct-to-Garment) technology. This results in long-lasting designs that are resistant to fading and cracking in the wash.

Say hello to Premium yet affordable Christian clothing.

Will the design peel in the wash?

Nope! 😁 Each design is professionally fused with the fabric and made to look great after a lifetime of wash cycles. It's always advised to wash inside out, but the design is no sticker. It'll stay with you for the long run!

How can I get FREE delivery?

Simply add ANY 2+ Christian T-shirts to your basket, and the delivery fee will miraculously vanish! 🥳

How fast is delivery?

Most items ordered to the UK should arrive within 3-5 working days. All other delivery times vary from country to country.

Do you care about the environment?

3rd Day is committed to staying ethical and kind to God's creation. All T-shirts are manufactured in an eco-friendly, ethical & humane way by BELLA+CANVAS®. Their efficient dye machines use eco-friendly dyes and 7x less water than the average clothing manufacturer. Then, 100% biodegradable (DTG-TX2) non-toxic and water-based inks are used for the designs.

Besides this, domestic delivery is made possible for international orders via a network of fulfilment centres, reducing 3rd Day’s carbon footprint. Plus, a tree is planted by Eden Reforestation Projects for every order. This helps to revive natural habitats, support local livelihoods and extract CO2 from the air.

Do you offer any discounts?

Sure! Get FREE Delivery with ANY 2+ T-shirts, plus an extra 10% OFF ANY 3+ T-shirts.

Discounts automatically apply. No codes needed! 🙂

Why wear Christian clothing?

Wearing Christian clothing is a simple yet effective way to share your faith everywhere you go. It's not awkward and encourages gospel-centred conversations and thoughts.

Your wardrobe is a gospel opportunity. Utilise it today! 😁