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Birthday Cards for Sister

Browse our collection of birthday cards for sisters! What relationship in your life is more special than the one you share with your sister? No matter what stage of life you are both in, whether she is older, younger or even a twin, we have the perfect card to express your heartfelt birthday wishes. Our birthday cards for sisters cover the gamut from sweet and sentimental to funny and sarcastic.

We offer cards for milestone birthdays, pretty cards, sentimental cards, trendy cards, humorous cards and cards that can be customized to say just what you want. You can even add a picture to make your card truly one-of-a-kind. Don't settle for another generic card off the rack, create a personalized card that she'll cherish as a keepsake for years to come! Once you find the perfect birthday card for your sister, we'll print and mail it the next day!
Birthday Cards for Sister

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Shopper Testimonials
“Great quality and excellent packaging to protect the delivery. I also love your wide selection of cards. I will be back!”
Susan - Nov 1st, 2026
“I have used Greeting Card Universe (GCU) for quite some time. It is a pleasure to write a review for them. The website is the best of the sites I have seen, which are similar to GCU. I have found a card -- every time -- for-every- reason that I've needed. Thank you for the great card! Anthony”
Anthony - Nov 2nd, 2026
Cards per Page:
Cards: 4,861 Pages: 163
Most Popular Newest Show adult cards
94th Birthday, Sister, Pink Rose card
58th Birthday, Sister, Pink Rose card
Sister Birthday Pretty Mixed Media Moon and Butter…
86th Birthday for Sister, Pearls and Petals card
For a Sweet Sister on Her 40th Birthday, Starfish …
Birthday Heart of Flowers for a Sweet Sister on he…
Funny Sister Birthday If Little Girls Are Made Of …
Happy Birthday for a wonderful Little Sister, Seas…
Happy 42nd Birthday or a Stunning Sister, Purple A…
Happy 77th Birthday to a Special Sister, Orange fl…
Happy Birthday Sister card
Happy Birthday to My Sister Watercolor Pink Magnol…
Happy Birthday Sister - Funny card
Happy birthday sister, sunset over the ocean card
86th Birthday, Sister, Pink Rose card
49th Birthday, Sister, Pink Rose card
Sister’s Birthday Pigs You are ImPORKtant card
Sister Happy Birthday Balloon Colorful Quirky Lett…
Sister Birthday Whimsical Flowers and Butterflies …
Birthday For Sister, Many Candles On a Cake card
Sister’s birthday, light blue butterflies. card
55th Birthday, Sister, with Magnolia card
Sister Happy Birthday Red Mums and Monarch Butterf…
Sister Birthday Watercolor Effect Pretty Blossoms …
51st Birthday, Sister, Pink Rose card
Happy Birthday Sister! - Verse Inside card
69th Birthday for Sister, Pearls and Petals card
Birthday Card For Sister Who Is Smart With African…
Birthday, Sister, Sanderling Bird card
Sister, Birthday,Flowers and Pearls card
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