Yes! Acetate glasses are easy to adjust and resize as they become malleable when heated. Your best bet is to visit a local optician or eyewear shop where someone can easily adjust your frames for you. However, if you prefer to try on your own, you can put your glasses under hot water or warm them up with a hairdryer for at least 20 seconds, after which you can softly press on the temples to adjust them for a comfortable fit.