Funny Birthday Card: "I'm still 84% sure you're adopted, but you're cool anyway."

Siblings are somehow both your best friend and your worst enemy. They know you better than anyone, and they could use that knowledge to destroy you at any moment. Time for a preemptive strike with this objectively hilarious birthday card.

• This card is empty inside, just like you
• 4″ × 6″ (101 × 152 mm)
• Comes with a white envelope