Do you buy your kids new shoes when they go up half a size?

Both my kids have gone up half a size. I got my daughter new shoes recently in the correct new half size because her school shoes were super worn out but haven’t bought shoes for my son in a while and he’s up half a size, his shoes look small and I can tell they feel small when putting them on. But measuring his foot he’s not ready for the whole next size up. I usually buy them good shoes that are good for foot growth so they’re not the cheapest but I hate to throw the money away if they’re going to have a growth spurt here soon and go all the way to the next size but obviously want them in the right size shoes and don’t know whennnnn they’re going to grow. I never really ran into this issue that I noticed when my first was younger or maybe I did and just didn’t realize there were half sizes. I don’t want them in shoes that are too big that are going to make them trip. Lol what do people do? They’re 5 and 2