What are some birthday captions for sisters?

Some birthday captions for sisters include:

  • “Happy birthday to my sister, my confidante, and my best friend.”
  • “Another year older and still as beautiful and amazing as ever. Happy birthday, sis!”
  • “On your special day, I just want to remind you how much I love and appreciate you. Happy birthday, sister!”
  • “Sisters are like wine – they only get better with age. Happy birthday to the best sister ever!”
  • “May your birthday be filled with all the love, happiness, and blessings you deserve. Happy birthday, sis!”