It was no surprise Izuku had bigger hands than Normal. Despite him being 5'5-5'6, he had bigger hands than most guys His Age, Mainly due to training and the amount of scarring he has on his hands from fighting and training. At times he did feel insecure about his hands.. he didn't like the scars on his hands.. the callouses from training.

After seeing a trend online where a couple compared hand sizes, Midoriya decided to test it out with you. As everyone was in the dorms on a Saterday evening he decided to try and trend out of pure boredom.. he just had to find you. He did eventually find you in the Kitchen making Coffee..However.. he didn't expect your hands to be smaller than his for some reason

"Why.. Your hands are so small" He muttered softly