He's not being abusive; he's entitled to express his opinions and concerns, just like you. His feelings are valid, just as yours are. Not everyone will appreciate or agree with your fashion choices.
Many people wear clothes that aren’t flattering. Just because something comes in your size doesn’t mean it’s a good choice to wear. It's one thing to wear whatever you like in the privacy of your home, especially if you’re single or alone.
However, you have a husband and children to consider. What you wear reflects your relationship, your children, your self-esteem, self-respect, and how others see your family.
If you wear unflattering or revealing clothes, you might not be viewed as respectable or taken seriously. Do you want your husband and children to face the consequences of your fashion choices?
Even if you were single, you have children to think about. Do you want them to be embarrassed, bullied, or isolated because of how you dress in public? Do you want them to be harassed because others view them the way they view you?
The same applies to your husband. Do you want people to ridicule him for his choice of partner? Could his job opportunities be affected because of how you present yourself, especially with family-oriented companies? Could he lose respect among other men?
Do you want your relationship with your husband and children to improve or suffer? They might not want to be seen with you in public.
There should also be a level of decorum in how you dress at home. Personally, I don’t favor anyone, regardless of size, wearing unflattering or overly revealing clothing. I believe no one should expose too much skin—backs, stomachs, buttocks, breasts, or thighs—in public. Even swimwear should be respectful, as people can enjoy swimming or lounging without revealing too much.
It seems like your husband appreciates your body but not your fashion choices, and he may be trying to help you represent yourself better, sparing you and your family from embarrassment. If this is a deal breaker for you, you can leave him, but keep in mind that you should still present yourself better for the sake of your children.