Consignment shops are a great option, I wish we had them closer to us.
When I do buy new I like Lands End for the kids and myself.
Dh, Me , DD 10 , DD 7 , DD 4
We , , , , not in that order
In our area, Macy's, Gap and Gymboree can all be very cheap with sale + coupons. I have gotten new clothing items for 99 cents. I usually buy end of season clothes one or two sizes up.
Thrift stores in our area stink and most don't even carry children's clothing.