We do a Sharpie on the label, be sure and put something under the label when you write on it in case it bleeds through. Of course if you have clothes that are tagless, or kids who make you cut out the tags, that is a problem. It won't bleed through on most jeans, but anything else, you might have an issue. Also, if they won't look at the label to see the size, they may not look to see their name either...and also what happens when the smaller one grows and gets some of the larger ones cast offs?