These are so cute! <3 Paired with the nametag holders that have holes for these characters' pegs to connect to, it's an amazing way to introduce yourself without a word. :) Once you pop out the characters, they will be tiny and loose pieces of plastic, so be careful when handling them!
The colors that match the name tag color may be slightly harder to read from a distance because they can have a semi-camouflaged effect. Consider a differing hiragana text color to contrast your name badge for maximum visibility from afar.
They're also very cute if you have enough space for the heart characters at the end! <3 <3