Bikini tops can be adjusted by adding, removing, or re-adjusting bra pads. Sometimes if your bikini is fully encrusted the fabric tend to be a bit stiff.
You can gently stretch the top a little to stretch out the fabric. Also, you can adjust the top by sliding them closer or further apart.
The bottom of each cup can also be scrunched more or less to adjust the fit. Sometimes you just have to take some time to play with the top and adjust it to your liking.
If the side of the cup gapes a bit, all you have to do is tighten the neck strap. This should fix the problem.
If you like your cups to be nonadjustable we can sew the middle connecter to the cup to add more cleavage.
Please keep in mind that if the middle is sewn together, the top becomes a little less adjustable. As long as you know how to adjust your breasts you should be good to go.