I ordered this necklace to replace the one my 7 month old son got a hold of and broke. The old one was .8mm and I worried this 1mm might look too big for the charm I wear on it. Not so! It's just a little bigger and is perfect. I love box chains, they don't get caught in my hair (I have waist length, naturally curly hair). Easy to clean, I just use a damp cloth and have had no problems. The clasp is very sturdy, and the mechanics of it move easily. If my son manages to snap this one, too, I will definitely buy this exact same necklace again. :)