Counters In Japanese


I'm a super beginner in Japanese, so excuse me if this question is really
simple. Or stupid.

As an exercise, sometimes I count up the things on nearby desks or tables and
try to list them in Japanese, just to get used to the counters. Today, I was
waiting to get lunch and I saw a table with three sandwiches (amongst other
things) on it, but I don't know what the counter for the sandwiches would be.
I know if I was to count the slices of ham within one of the sandwiches, I
could use -[切れ]{きれ}. Otherwise, I don't know. Is there a counter for something
made up of smaller pieces of something else?

I suppose I could use a general counter, but I was wondering if there was a
counter for things like loaves of bread or blocks of cheese that could also
apply to things like sandwiches?




I believe the most common thing to do with sandwiches is use つ.
（サンドイッチを３つもらえますか？） There probably is a correct counter for loaves of bread,
but I don't know it, and again I think つ is more common.

