Yes, in addition to the pairs we offer, you can combine them as you wish. Many of our customers have different sizes and combinations of balls, some couples have complete sets of all Viball sizes. Another side effect: Larger balls in particular develop an additional resonance when in contact (with a smaller one). Some users prefer many small balls in a "cluster" or as an (anal) chain, the individual preferences and erotic possibilities are diverse.
Alternating vaginal or rectal use is also no problem, because Viball love balls are extremely hygienic and can be sterilized in any way thanks to the polished surface of implant steel. However, when the balls come into contact with each other, friction can cause stripes on the surface because the balls rotate and move in the body. However, these stripes are only in the polish and cannot be felt, so they play no functional role. If necessary, our balls can be repolished by manufacturers of stainless steel jewelry.