Small (3.5 inches)

Slender and small. Two words perfectly encapsulating Shirou's penis. Over three inches and certainly below average, it was a sight of shame for the young man. Glimpses in the locker room told him men weren't supposed to be as small as him. There was a particular incident where Shirou was forced to directly compare with his friend, Shinji. Suffice to say, Shirou lost that comparison. Badly.

"Oh my god! What is that!?" Shinji threw his head back, laughing. "I've seen worms smaller than that! Hahaha!"

Issei offered a look of great sympathy that day. Shirou hated himself for losing to Shinji of all people. Annoying, popular, egotistical Shinji Matou. Shirou didn't think he was that much bigger either. The problem was that Shirou was just too small.

Three and a half inches long and as thick as his thumb. No matter how aroused he got, he was never able to go past four inches. He was forever stuck in the objectively little size of three and a half inches.

Shirou sighed and peering down at his manhood. He had many grievances in life and his penis size was just one of them.