I ordered size 13 and 15 tips and when they came I ended up with 3 13 tips and 1 15 tip... I have NO clue how it happened, but it must have been sometime during packaging. Anyway, they sent out replacement 15 tips the next day... only they misread my e-mail so they shipped out Harmony tips instead of the Options that I wanted. Just e-mailed again today and made sure to include the product number. Still waiting to hear back from them (seeing as how I just e-mailed that's to be expected)... but I know they'll make everything right!