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Valentine's Day Cards for Sister

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Shopper Testimonials
“These cards are amazing. Beautiful quality & the ability to customize makes every card incredibly special. I would highly recommend to all!!!”
Cheryl - Palm Harbor, Florida - Sep 2nd, 2025
“I just love all the cards I order from Greeting Card Universe. I can personalized each card and find the hard to find' cards. Everyone I ever sent one of these cards, I always get a positive response. They are always so surprised and ask where do I find such unusual cards. Great service!!!”
Doreen - El Paso, Texas - Sep 1st, 2025
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Most Popular Newest Show adult cards
Sister - Naval Aviator Bear - Valentine card
Sister Custom Photos Calligraphic Heart Valentine …
Sister 4 Custom Photos X O Hearts Valentine card
Sister, Happy Valentine’s Day, Heart Full of Love …
Happy Valentines Day Sister Orange Tabby Cat in He…
Valentine Sister Feminine Gifts Wrapped Fuchsia Ze…
Sister Happy Valentine’s Day Hydrangea Heart Bloss…
Valentine Birds Hearts Poppies and Rainbow for Sis…
Sister Valentine’s Day Little African American Gir…
Happy Valentine’s Day Little Sister Be My Valentin…
Happy Valentine’s Day for Sister - Pink Hearts car…
Sister Happy Valentines Day with Big Heart and Han…
Valentines Day String of abstract Colorful Hearts …
Sister Valentine’s Day Cat Purr-fection card
Sister I love you Every Day Pink Heart Valentine’s…
Valentine’s Day Sister - Boy Toys card
Dogs Hearts Wonderful Sister Valentine’s Day card
Happy Valentine’s Day Sister Narcissus Flowers Cus…
Happy Valentines Day Sister Cute Cat WIth Red Rose…
Little Sister Valentine’s Day Teddy Bear and Purpl…
Blush Pink Watercolor Flowers Sister Valentine’s D…
Pink Floral Heart Sister Valentine’s Day card
Happy Valentine’s Day Big Sister Be My Valentine M…
Sister Valentine’s Day Cute Cat Floating on Clouds…
Sister - U. S. Air Force Garrison Cap Bear - Valen…
Elephants Hearts Wonderful Sister Valentine’s Day …
Sister - U. S. Army Black Beret Uniform Bear -Vale…
Sister - Coast Guard Bear - Valentine card
Sister - Navy Working Uniform Bear - Valentine car…
Sister - U. S. Air Force Working Uniform Bear - Va…
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