Girls clothes sale is fairly basic in that is looks like small sized versions of men’s formal wear. You can easily find formal ware for your girl that will fit but you want to find the best clothes for him and for your pocket book.
If your son is young and still in diapers find something that is easy and quick to remove. Make sure the pants have an elastic waist band. The shirt and jacket should be easy to unbutton. If you can find a shirt and jacket that look like buttons but are actually snaps that would be a great choice.
Girls have a ton of energy and like to roughhouse a lot. Buy girls clothes sale that is very durable. You may be tempted by a really cheap price but if the fabric is too flimsy he is just going to rip it to shreds. Try to find a compromise with some reasonable priced quality baby clothes. You don’t want to spend a fortune because he is going to outgrow it rather quickly.
Try to find something that your girl likes. If he hates the clothes he is going to try to get out of them and he is not going to take care of them. If he likes the clothes he is likely to care if they get dirty or torn so he might be a bit more careful.
Stay with the same color scheme throughout the years. That way you can mix and match later. His pants might get too short, but the jacket still fits. If everything is black you just have to find new pants and not a new suit. You can vary the color with the baby accessories like the tie and shirt.
Make sure that any formal wear shoes are comfortable. It will keep everyone happy and calm for the formal event.