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Nothing captures sisterhood like inside jokes and uncontrollable laughter. This playful design features a hand-drawn doodle of two sisters mid-laugh, with the bold statement: “It’s a Sister Thing — You Wouldn’t Understand.”
Printed in simple, clean black line art, this long-sleeve tee is as easygoing as it is relatable. Perfect for gifting, lounging, or twinning with your favorite sister.
Because let’s be honest — if you’re not part of the sister squad… you just wouldn’t get it. 💬👭
• 100% airlume combed ring-spun cotton
• Heather colors are 52% combed and ring-spun cotton, 48% polyester
• Athletic Heather and Black Heather are 90% combed and ring-spun cotton, 10% polyester
It’s a Sister Thing — You Wouldn’t Understand Long Sleeve Tee
$20.48
Printed in simple, clean black line art, this long-sleeve tee is as easygoing as it is relatable. Perfect for gifting, lounging, or twinning with your favorite sister.
Because let’s be honest — if you’re not part of the sister squad… you just wouldn’t get it. 💬👭
• 100% airlume combed ring-spun cotton
• Heather colors are 52% combed and ring-spun cotton, 48% polyester
• Athletic Heather and Black Heather are 90% combed and ring-spun cotton, 10% polyester
Size guide
| SHIRT LENGTH (inches) | CHEST WIDTH (inches) | CHEST TO FIT (inches) | SLEEVE LENGTH (inches) | |
| XS | 27 | 16 ½ | 31-34 | 25 |
| S | 28 | 18 | 34-37 | 25 ⅝ |
| M | 29 | 20 | 38-41 | 26 ¼ |
| L | 30 | 22 | 42-45 | 26 ⅞ |
| XL | 31 | 24 | 46-49 | 27 ½ |
| 2XL | 32 | 26 | 50-53 | 28 ⅛ |