Minimize
In the first year or two of life, babies need an entirely new wardrobe every 3-6 months! The messes that get onto their clothes are gross so their little clothes need to be washed frequently. I don't like to leave a shirt covered in spit up or mushed bananas for long, so I do laundry every 2-3 days. For each clothing size, you only need about 6-10 outfits. One of those should be something special for holidays or special occasions.
You might be lucky enough to receive gifts and/or hand-me-downs. Don't let the allure of free clothing distract you from keeping a minimal baby wardrobe. Getting rid of extra will make your life so much easier. It will be easier to do laundry, fold laundry and choose an outfit each day. Pick your absolute favorites and donate the rest!
Organize
With twins, especially with boy girl sets, it's best to have some things they can share. Packages of all-white onesies will simplify matters. You'll thank me if you take my advice and just buy a big package of plain white socks (I like Old Navy with the grippy letters on the bottom) and let them share.
My closet storage for the twins consists of four large wire baskets. (wire or clear is best so you can see the items through the basket)
- onesies and sweaters
- pajamas (they are mixed in the same basket even though some are boy or girl specific)
- Boy clothes
- girl clothes
I also have three smaller baskets for swim diapers and suits, socks and shoes, and hats. I only hang their special occasion outfits.
Too Big or Too Small?
As I mentioned above, babies outgrow their clothes quickly during the first two years of life. Make it easy on yourself and give yourself two extra baskets in the babies' closet. One for outgrown clothes. One for next size clothes (with twins, you may want to have two in the next size especially if boy/girl). When you realize during an outfit change that those red pants look like shorts on your son, you might be tempted to just toss it back with his clothes. If you have a basket in the closet for outgrown clothes, you'll have a place to keep it and you won't make the same red-pants mistake the following week.
Same goes for the next size of clothes. Remove tags and wash all clothes that are in the next size and keep them in a basket in the closet. That way when a handful of clothes have been outgrown you can start to slowly replace with the next size without dragging up big bins of clothes and making it a huge process.
Remember, only 10 items per size per child!