I regularly purge whatever my kids grow out of or do not wear.
It not yes, it seems like they have millions of clothes.
Which in actuality, the clothing that actually fits them and which they wear... is not a monstrous amount.
Roughly speaking:
My daughter has about 8 pairs of jeans.
About 3 athletic type pants. (ie: yoga pants or sweats).
About a dozen t-shirts.
About 5 leggings.
About 3 pairs of flip-flops and about 5 pairs of covered shoes type things.
1 dress just in case (she does not wear dresses anymore hardly).
1 pair of sand shoes for each kid.
My son has about 10 t-shirts
about 3 pairs of flip-flops
About 4 pairs of covered shoes
about 8 pairs of shorts
1 pair of long athletic pants
(he does not like jeans and it is too hot for him, here).
Oh and a nice polo shirt, just in case. But here it is so casual.
Then they both have 2 bathing suits each.
And 1 sun top each. ie: rash guards.
And about 12 pairs of underwear, each.
Lots of the clothing they have, are bought by their generous Aunty and myself.
My kids... DO wear, each and every one of those items/clothing/shoes they have. So it is not a waste.
But yes, kids' clothing accumulates. And they grow SO fast.
My kids, within 2 months, outgrew some shoes I had bought them this summer.
They grew into another size, already. Within, 2 months.
And, my daughter, since school started about 1 month ago... grew out of her t-shirt tops, already and into the next size up.
So, I tossed her newly outgrown tops, and had to buy and replace them.
I only buy, what I KNOW my kids like. And will thus wear. So I don't have much 'wasted' clothing of theirs.