Hi all,
I am pretty sure that clothes is a plural noun but I don't know whether it is countable or non-countable; my dictionaries don't mention it. Plural but non-countable sounds weird to me, though.
I guess why so many non-native speakers including me are confused about using the word "clothes" is that we think clothes is like a jacket, a sweater, a pair of socks etc that we are wearing. But to my understanding, a jacket doesn't equal clothes but just a piece/ suit of clothing. That is, clothes means the things you wear from top to bottom, not just a single item. Therefore, if you say "several clothes", it sounds like you have one, two, or three clothes which is not grammatically allowed to use. Using "many clothes" is OK because it doesn't express a number.
Last, I think clothes is countable but you have to use it with quantifier-- many, a lot of, some, etc. Or use nothing before it. Just my two cent and please make comments about my opinion.
LCChang