The Best One – Happy Birthday Sister-in-Law Cards

Joy & Prosperity– Happy Birthday Sister-in-Law Cards

Woohoo! Your sister-in-law's birthday is just around the corner and since both of you are basically best friend now, it is time to plan a huge celebration for her. Top it off with this sweet ecard too.

A Blessed One – Happy Birthday Sister-in-Law Cards

Her presence indirectly brings happiness to you. She is now among your bestest friend. On her birthday, celebrate her and treat her well. Don't forget to pass her this ecard too.

Precious Gifts - Happy Birthday Card for Sister-in-Law

Which is more important: presents or presence? By sending this precious gifts happy birthday card to your cherished sister-in-law you will be letting her know how much her presence in the extended family means to you! She's a gift that keeps on giving and you want her to accumulate many more joyful memories with all of you! Keep the good times rolling!

Party Dog - Happy Birthday Card for Sister-in-Law

Party Dog has spoken and we're good listeners. This bright eyed pup in his jaunty party hat is clearly an expert on fetching good times! He wants to tell your sister-in-law happy birthday, and thanks for being the person she is, so what are you waiting for? Send this card now! That wonderful human being deserves it and she shouldn't have to "beg" you to remember her birthday!

Awesome Kitten - Happy Birthday Card for Sister-in-Law

Is your sister-in-law simply the best? The cat's meow, so to speak? Send her this adorable happy birthday card to wish her a wonderful day and let her know how awesome you think she is! Featuring an adorable blue-eyed kitten popping its head out of a pink, gift-wrapped package, this birthday card is guaranteed to make her day even more special!

Party Candles - Happy Birthday Card for Sister-in-Law

Your entire family loves any excuse to gather together and party it up! When you gained a new sister-in-law your whole unit also got a brand new, yearly-occurring reason to throw yet another relatives shindig! Tell Mom to get baking, tell Uncle to bust out the video camera, and maybe Granny will make her famous potato salad! Let that good-livin' gal know how much she's appreciated in your circle by sending this party candles happy birthday card!

Cheerful Puppy - Happy Birthday Card for Sister-in-Law

Your sister-in-law is inarguably one fantastic woman! Her confident, playful spirit makes her the perfect adventure buddy. It just might put a big ol' grin over her chin and make her dog-gone happy to know you hope her birthday isn't too 'RUFF' with this happy puppy birthday card. She’ll definitely love this smiling party-hatted pup, no ifs, ands, or mutts!

You Bring Happiness– Happy Birthday Sister-in-Law Cards

She so kind to you. She welcomes you in the family and treat you like her immediate family. Time to show some appreciation by celebrating her upcoming birthday greatly. Make her smile at the start of her birthday by sending her this ecard.

Amazing Sister & Friend – Happy Birthday Sister-in-Law Cards

She might be the sister that knows you since you were small but both of you are close with each other. Appreciate her for being who she is with you. On her birthday, send her this ecard.

Glitter Cake - Happy Birthday Card for Sister-in-Law

Does your sister-in-law love glitter? How about the color pink? Is she something of a diva, or maybe just has a flair for the dramatic? If you answered "yes!" to any of those questions then you've just got to send her this glittery birthday cake card for her big day! She sparkles, she shines, and you need to celebrate her boldly!

Beloved Poem - Happy Birthday Card for Sister-in-Law

Does your beautiful sister-in-law inspire you to poetry? Even if you aren't much of a poet yourself, or don't have any time on your hands to craft a sonnet, let us do the smooth-talking for you and simply hit send on this beloved poem happy birthday card! This little rhyme is sure to make her feel loved by, not only you, but the entire family!

Dreams Will Come True– Happy Birthday Sister-in-Law Cards

Birthday celebration with your bestie is always great. It is greater when that bestie is your own sister-in-law. Plan a great day our for her and take this ecard as an invite to tease her of what's happening on that day.