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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
“We would be lost without Greeting Card Universe. What other greeting card company has endless selections, the added bonus of personalization and prices that cannot be beat. We highly recommend Greeting Card Universe to all those who are frustrated with the limited greeting card selections in brick-and-mortar stores.”
Kathryn - Nov 3rd, 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: 4,835 Pages: 162
Most Popular Newest Show adult cards
Happy 31st Birthday or a Stunning Sister, Purple A…
Birthday, Sis, red bloom card
Happy 41st Birthday for a Sister, Rudbeckia flower…
Hey Sister, its Your 14th Birthday, Sea Shells and…
Happy 30th Birthday or a Stunning Sister, Purple A…
Happy 14th Birthday for my Sister, A Young Fawn in…
Hey Sister, its Your 13th Birthday, Sea Shells and…
Birthday for Sister, Colored Balloons in Blue Sky …
Happy 13th Birthday for my Sister, A Young Fawn in…
Happy 47th Birthday, Sister, Monarch Butterfly car…
Happy 45th Birthday for a Sister, Rudbeckia flower…
22nd Happy Birthday Sister, Magnolia Blossom card
Happy 46th Birthday, Sister, Monarch Butterfly car…
Happy 47th Birthday for a Sister, Rudbeckia flower…
Happy 25th Birthday or a Stunning Sister, Purple A…
21st Happy Birthday Sister, Magnolia Blossom card
Birthday, Sis, Celebrate, Retro Flowers card
Happy 38th Birthday to a Special Sister, Orange fl…
Happy 43rd Birthday to a Wonderful Little Sister, …
Happy 93rd Birthday or a Stunning Sister, Purple A…
Sister 15th Birthday Crazy Socks card
Happy Birthday Sister Pink Flowers Floral Still Li…
Sister 45th Birthday Traditional card
15th Birthday for a Special Sister, Magnolia Bloss…
Birthday Heart of Flowers for a Sweet Sister on he…
Sister 102nd Birthday traditional card
Sister 30th Birthday traditional card
Happy 84th Birthday or a Stunning Sister, Purple A…
16th Happy Birthday Sister, Magnolia Blossom card
For a Sweet Sister on Her 31st Birthday, Starfish …
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