Mini Geek Boutique
Glow in the dark Celestial dice black organic t-shirt
Glow in the dark Celestial dice black organic t-shirt
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Your favourite Celestial Dice design is now wearable—and it glows in the dark! ✨🎲
Whether you're heading into a dungeon or just out and about, this magical T-shirt is perfect for tabletop gamers, stargazers, and lovers of all things geeky. The glowing constellation-style dice design is pressed by hand onto soft, black organic cotton for a comfy, ethical choice with serious style points.
D E T A I L S
- 100% organic ring-spun combed cotton
- Set-in sleeves with 1x1 ribbed neck collar
- Inside neck tape in self-fabric
- Wide double-needle topstitch on hems
- Medium fit, short sleeve, round-neck
- Soft single jersey, fabric washed for extra comfort
Available sizes:
Kids: 1–2 yrs, 3–4 yrs, 5–6 yrs, 7–8 yrs, 9–10 yrs, 12–14 yrs
Unisex: XS (34/36"), S (36/38"), M (38/40"), L (41/43"), XL (43/45"), 2XL (46/47")
Please note: Actual garment colours may vary slightly due to screen settings.
Materials
Materials
Unless otherwise stated, each garment is organic cotton.
MGB has spent years sourcing suitable manufacturers and uses Stanley/Stella and Babybugz.
For hoodies and sweaters MGB uses JustHoodiesby AWDis
Shipping
Shipping
UK orders are sent via Royal Mail Tracked 48, with free UK delivery on orders £30 and over. Delivery costs are shown at checkout.
We also ship to selected international destinations, excluding the EU.
Read our full shipping information for delivery estimates and further details.
Sizing
Sizing


Care Instructions
Care Instructions
We use several methods of printing for our designs:
For our full colour printed designs:
- Turn the garment inside out before washing, this protects the design from being bashed about and peeling away from the garment or from fading.
- Do not dry clean garments and bags that have heat applied designs
- Wash in a cold or warm temperature to prevent the design from ungluing from the garment or bag.
- Use a mild detergent.
- Iron on the inside, do not iron directly over the design as this will damage your iron and your garment
Heat Transfer Vinyl (HTV):
It is fairly robust and looks amazing but this does mean the garment requires special care if they are to last as long as possible:
- Turn the garment inside out before washing, this protects the design from being bashed about and peeling away from the garment
- Do not dry clean garments and bags that have heat applied designs
- Wash in a cold or warm temperature to prevent the vinyl from ungluing from the garment or bag.
- Use a mild detergent
If the vinyl does start to peel away at the edges; simply use a hot, dry iron to apply pressure and use greaseproof paper over the design to protect it if necessary.
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