Gaah, Satsuki says something about not being as...well-endowed as Matoi and Senketsu replies, "Absolutely not!", but I for the life of me cannot tell what that kanji after じゃなくて is...

NinjaPope said:

Gaah, Satsuki says something about not being as...well-endowed as Matoi and Senketsu replies, "Absolutely not!", but I for the life of me cannot tell what that kanji after じゃなくて is...

慣れないか　- Not used to

So it's "So you're not used to a size that isn't Matoi's"

azurelorochi said:

慣れないか　- Not used to

So it's "So you're not used to a size that isn't Matoi's"

Ah, thanks a bunch! No wonder I couldn't find anything when I was searching for kanji containing 十...it was 忄all along...