I've got sew in labels for ds1 but with "ds1name ds2name surname" so that I can either just sew the whole lot in or fold one of the names away when stitching in. There's also a train icon to help ds1 find it more easily (ds2 not started school yet)
Mind you - ds1 is about to go into year 2 and I still haven't actually sewn any in, just used fabric markers
, occasionally refreshing if they look a bit faded. I keep one in the car (and an ordinary sharpie) for any last minute labelling needed and one at the top of ds1's wardrobe (too far up for him to spot it and have never let on that it is there otherwise it would be in his penpot!) as well as one on the window sill near where I put the boys clothes out in the morning so there is always one handy when needed.
I also second writing names in different places so you can tell when looking through the cloakroom regardless of anybody pinching things. With the white polo shirts they need to wear, I've also got in the habit of writing the name on the seam of the back of the collar to help so it is easy for ds1 to see as well as on the label (typically in the side seam).
I'd also always label both shoes or wellies in a pair - can't imagine doing just one but ds1 came home without wellies one day because he'd realised that what he thought were his weren't as they didn't have his name in. There were actually 3 of them that had identical wellies, and all 3 had got mixed up. Meant that DS didn't have wellies at school for several days (in the snow so when you needed them and couldn't even buy any more in the shops as they were all sold out). Mum of the boy who had taken ds's wellies cornered me to ask for her son's wellies before she gave ds his back
and didn't want to give them back when I couldn't give her son his back as ds had had the other pair and that little boy had got the other ones. When I pointed out that they were definitely my son's wellies as his name was written in them in big letters and could she not just intercept the other mum to show/ask about the name of her son's wellies, she said that she had only labelled one of them, thinking it was enough to label 'the pair' rather than each one which seemed a bit
.
Was very miffed that she even dared think that she could hold onto ds's wellies until the other ones came back to school though 