I use hearts on so many of my cards, no matter what the reason or occasion for the card. These are great. On the card front - use pretty paper, then a strip of contrasting cardstock followed by the these heart die cuts, so pretty. Maybe, add a bow. Perfection!
I could not tell from the image or the description so I asked the question and bought it anyway. Sure enough, it is a vertical line of connected hearts.
The hearts are very delicate which presents some thought to method of attaching. Even the smallest photo splits are too large. Liquid glue/glue pen will work. The best option I found is to apply double sided adhesive before you die cut. Then you simply peel away the backing and adhere.
It is a pretty embellishment - especially when you add some pearls or rhinestones.