You can use the following gift ideas for saying sorry to your partner
Flowers
Flowers are one of the most preferred gifts used for saying sorry. Gift
your partner his/her favorite flowers, be it red roses, carnations,
lilies, and so on.
Chocolates
Girls are not the only ones who like chocolates, guys are equally fond
of them.
Cards
If you do not how to say sorry, then cards will be the perfect gifts
for your beloved. Through them, you can easily convey your feelings.
Show Pieces and Mugs
You can also buy a showpiece or a mug with the words like "I am
sorry", "Forgive Me", etc.
Wind Chimes
Wind chimes can also be given as gifts for saying sorry.
Photo Album or Photo Frame
Buy a photo album or a photo frame. But remember to fill it with some
cute photographs of both of you before gifting it.