I use ear muffs a lot depending on temputures, foam plugs if very warm. Safety glasses were a major problem as I was basically legally blind, but could be corrected with lenses. This made for very thick lenses that caused distortion around the outer edges, that made it hard to distinguish movement and made for eye strain, the arm size was also a problem as an ear muff did not seal well and muff tended to cause pressure on the arm making for sore pressure spots on my head. Basicly, a wire type arm on the glasses and some higher grade muffs helped greatly.
I think a lot of the cheaper safety glasses and ear muffs are of very poor quality and will not fit most people well, some say better then nothing, I say you may need to buy your own, if supplied equipment does not cut it, and one pair of safety glasses and ear muffs will not do the job on every job.
On my last job, I had 2 sets of muffs, both higher end units, one set, the single band over the head, could be worn with baseball cap style cap or toque, the other pair, a soft band over the head and a solid band in back, allowed wearing a hard hat. The smooth foam plugs went with all as needed. I also had 2 sets of safety glasses that would go over regular persipion glasses and a face shield that could go over them.
The hardest to wear and tolerate was the respirator with persipion glasses, safety glasses, ear muffs, hard hat and the shield, couldn't do it for more then a few hours in the heat. Could be hard out side in -30 too.
Anyway a good safety supply store may allow try on to check fit and comfort.