Will a bidet attachment fit my toilet?

Most attachments are designed for standard two-piece toilets and work with both round and elongated bowls, but the slim profile matters. Reviewers consistently flag that thicker attachments create an uncomfortable gap between the seat and bowl; thinner designs (around a third of an inch) avoid this. Measure your toilet's bolt spread and check the manufacturer's compatibility chart before buying, especially for one-piece or French-curve toilets.