If you have a bunion, finding a cycling shoe that’s wide enough can be a challenge, especially if the rest of your foot isn’t wide. One solution is to find a shoe with mesh over the bunion which will be more forgiving than leather or vinyl trim. The image below shows an older model Pearl Izumi shoe which had trim over the bunion, making the shoe too tight.
In this case, the simple solution was cutting away the trim in the area of the bunion, to expose the mesh. This allows for expansion of the forefoot without compromising the rest of the shoe fit.
Dr. Jenny Sanders Shoe Blog 