Matching Symbols: Choose a symbol or design that is significant to both of you. It could be something that represents your relationship shared interests or a special memory. Popular options include hearts infinity symbols puzzle pieces or a phrase or quote that holds personal meaning.

Complementary Designs: Instead of identical tattoos you can opt for complementary designs that when put together create a cohesive image. For example one partner could get the outline of a key while the other gets a matching lock. When you join your tattoos they form a complete picture.

Coordinates: If there is a specific location that holds special significance for your relationship consider getting the coordinates of that place as tattoos. It could be the place you first met got engaged or any other significant spot.

Initials or Names: Some couples choose to get each other's initials or names tattooed. This is a permanent way to show your commitment and love for one another. However it's important to carefully consider this option as it may not be suitable for everyone.

Puzzle Pieces: Puzzle piece tattoos symbolize how you and your partner complete each other. Each of you can get a puzzle piece tattoo and when you join them they form a complete puzzle.

Matching Quotes or Lyrics: If you and your partner have a favorite quote or meaningful lyrics from a song you can consider getting matching tattoos of the words. This can be a beautiful reminder of your connection and shared values.

Yin and Yang: The yin and yang symbol represents the balance and harmony between two opposing forces. It can be a great choice for couples who complement each other's strengths and weaknesses.

Fingerprints: Another unique idea is to get each other's fingerprints tattooed. This is a personal and intimate way to symbolize your unique bond and connection.

Roman Numerals: If there is a specific date that holds significance for your relationship such as your anniversary or wedding day you can get the date tattooed in Roman numerals.