21. Sending birthday love your way, sis!
22. Sisters help make the hard times easier, and the easy times more fun.
23. Happy birthday to a sister who means everything to me.
24. Have a birthday that is as sweet and wonderful as you are.
25. I feel so lucky that my dear sister is also a true friend. Happy birthday, you are the best!
26. Sister, you are an incredible, adventurous human. You have already achieved so much in life, and you're truly an inspiration. I'm so proud of all that you have accomplished. Happy birthday!
27. Friends come and go through life - family is forever. Here's to making more precious memories together until we're old and gray. Happy birthday!
28. Happy birthday to the best sister a girl could ask for! Hope your day is full of fun!
29. Our paths may change as life goes on but our bond as sisters will remain ever strong.
30. You're truly one in a million - so kind, caring, and sweet. To be honest, I am not sure how we are even related! I hope your birthday is as amazing as you are.
31. Some people are just a joy to be around. You’re one of them. Thank you for being you! Happy birthday.
32. Sisters are connected heart-to-heart. Distance and time can't break them apart.
33. We share our parents and the most precious memories of childhood. You know me inside and out. I'm so grateful that you're my sister. Happy birthday!
34. You are one of the kindest and loveliest people I know. I'm glad that we're not just sisters, but that we're also best of friends! Happy birthday!
35. My sister is my best friend, and I would be lost without her.
36. No one can heal my pains and make me happy with a hug like you. Thanks to my sister for being around me always. Let me hug you for once on this special day of your life. Happy birthday.
37. A birthday kiss for my amazing sis! I’m sure you’ll find fun and adventure on your big day, just as you do every day!
38. A sister is someone who always understands you, cares for you, and loves you. You are an exceptional one, and I hope you have the best birthday!
39. Happy Birthday! Here's to the cutest, smartest, most perfect sister! I think it must run in the family.
40. Today we celebrate the person who brings so much joy to our lives. Happy birthday, sister.