Siblings Are Proof – Funny Sibling Birthday Card

ALL GREETING CARDS – Buy 5 for the Price of 4 With Code: 5FOR4

Bright white card 5″ x 7″– A7 size
Printed on a heavy card-stock
Blank inside for your profound thoughts
Coordinated envelope included
Packaged in a plastic cover sleeve

This “Siblings Are Proof” card is a hilarious birthday card for brothers and sisters who appreciate sarcastic family humour and aren't easily embarrassed. Featuring the message, “Siblings. The proof that our parents had sex more than once,” followed by a cheeky reminder that the mental image is their birthday gift, this card delivers the perfect mix of sibling rivalry, awkward humour, and birthday laughs.

Perfect for brothers, sisters, step-siblings, or lifelong partners in crime, this birthday card is made for families that never miss an opportunity to tease one another. Whether you're celebrating an older sibling, younger sibling, or your favourite sibling, this card is guaranteed to get a laugh and probably an eye roll too.

Printed on premium heavyweight cardstock, this greeting card has a polished, high-quality feel while keeping the focus on the bold, humorous message. The blank inside gives you plenty of room to write your own birthday wishes, a funny memory, or another reason you're obviously the better sibling.