Doing my civic duty.../Donating blood

I actually went to the nursing home today and gave blood...first time I have ever gave blood...it seems that a nurse should have done this before, and I have wanted to for a long time, but it never was convenient...so, I figured that this time I would make time and just go....So I did...usually needles don't bother me and I was actually reading Lukas' T-cap grades and it did hurt, but I didn't look...I usually watch the stick...but didn't watch this time just because...so anyway, I did look down right before she took the needle out and it literally freaked me out!!!!! I think it was bigger than an 18 gauge!!! Does any of you medical people know what size needle is used??? I mean, this needle was bigger than a pencil lead!!!!! HUGE!!!! I am glad I didn't look before she stuck me or I would have passed out.