「小さいからって見くびるな！」
"Don't underestimate me cause I'm small!"

... I think!

Pretty close. からといって (here contracted) is a concessive form, so it could be translated as "I may be small, but don't underestimate me!" or "Don't underestimate me just because I'm small!"

I will now think of this everytime I use my shuffle =w=

i have a blue ipode book light in this form