Depending on how your PWD feels I would aim for somewhere not too obvious as you don't always want labels to be visible.
I go for where the label tape often is at the back of the neck on tops or waistband of trousers, I think it helps laundries to have them in the same place. On socks, I try to put the label under the foot, so it is less obvious, Mummy doesn't walk much so it isn't likely to be uncomfortable. If he is walking, perhaps around the ankle bit.
I sew all around the label edge to be hardwearing, but I like sewing.....
For many inanimate objects - brush, comb etc I write her name on with a sharpie pen - works pretty well.
