Shop at the Consignment sales/stores.
I grew up the middle of three girls. Meaning (here comes the middle child whine) I got all the older sister hand-me-downs and my younger sister AND older sister got new clothing…it’s so unfair!
Our family has an only child. So she gets a lot of “new” clothing just for her. But, as the daughter of WWII/Victory Garden Parents, we bargain shop. I find some of my best bargains and clothing at the consignment stores. Often you are able to find new tags still on designer clothing at the local Goodwill, Salvation Army or other church outreach sale.
If you are ambition enough and I did when our daughter went through clothes faster you can consign and earn both a little money on selling your own clothing but best of all you get the chance to enter the sale sooner and get the best bikes, high chairs, swings, etc. As a bonus, remember the money you spend is often going to help a worthy cause.
It’s really the only way to keep fun new clothing on the kids and spare money in the pocket while they grow in and out of clothing every 6-12 months.
To really double up on doing good, donate your out-grown clothing as well. (Please make sure it is clean and in good shape. Goodwill and other stores like that are working with a majority volunteer staff and they don’t have extra time to find the holes and stains and ultimately toss your donation.)