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Oh! Shirts By Subject
Home
Most Bought
All
Summer
GenX Lingo
Pet
Punk & Political
General
UK Lingo
Love & Stalking
Office
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Yoga
Horror
Midlife Mood
She-Ros
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FREE SHIRT
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Most Bought
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MindPop Shop When You grow up T-Shirt

When You grow up T-Shirt

from $29.95
The ultimate mic drop for every know-it-all in the room. This "When You Grow Up, You’ll Understand" tee delivers vintage wisdom with a side of sarcasm. Perfect for those who’ve been there, done that, and have zero patience for explaining the obvious.

Why You’ll Love It:

Soft but Serious: Ultra-comfy cotton that feels as good as it looks—no lectures required.
Timeless Attitude: Bold graphics with that “I told you so” energy baked in.
Unisex Fit: For parents, mentors, and anyone who’s got life’s cheat codes figured out.
Wear it as a warning, a lesson, or just because you’re tired of repeating yourself. Some things only make sense after you’ve grown up—until then, they can read your shirt.

T-shirts are a dime a dozen, but this one stands out from the pack. It’s super soft, breathable, and has just the right amount of stretch. Need we say more?

• 100% combed and ring-spun cotton (Heather colors contain polnoter)
• Fabric weight: 4.2 oz/yd² (142 g/m²)
• Pre-shrunk fabric
• Side-seamed construction
• Shoulder-to-shoulder taping
• Blank product sourced from Guatemala, Nicaragua, Mexico, Honduras, or the US
Color:
Size:
Quantity:
Add To Cart

When You grow up T-Shirt

from $29.95
The ultimate mic drop for every know-it-all in the room. This "When You Grow Up, You’ll Understand" tee delivers vintage wisdom with a side of sarcasm. Perfect for those who’ve been there, done that, and have zero patience for explaining the obvious.

Why You’ll Love It:

Soft but Serious: Ultra-comfy cotton that feels as good as it looks—no lectures required.
Timeless Attitude: Bold graphics with that “I told you so” energy baked in.
Unisex Fit: For parents, mentors, and anyone who’s got life’s cheat codes figured out.
Wear it as a warning, a lesson, or just because you’re tired of repeating yourself. Some things only make sense after you’ve grown up—until then, they can read your shirt.

T-shirts are a dime a dozen, but this one stands out from the pack. It’s super soft, breathable, and has just the right amount of stretch. Need we say more?

• 100% combed and ring-spun cotton (Heather colors contain polnoter)
• Fabric weight: 4.2 oz/yd² (142 g/m²)
• Pre-shrunk fabric
• Side-seamed construction
• Shoulder-to-shoulder taping
• Blank product sourced from Guatemala, Nicaragua, Mexico, Honduras, or the US
Color:
Size:
Quantity:
Add To Cart

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Sizing Information

Size Chart (Unisex TeeShirt Sizing):
When in doubt, size up for a looser fit.

Width = Armpit to Armpit
Length = Shoulder to Bottom Hem

SIZE WIDTH (in) LENGTH (in)

S 18 28

M 20 29

L 22 30

XL 24 31

2XL 26 32

3XL 28 33

Fit Tips:

  • These are standard unisex tees. They run true-to-size for men, and slightly roomy for women.

  • Want a fitted look? Consider sizing down.

  • Prefer oversized chaos energy? Size up.

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