The pattern claimed to be 15 minutes, and it was actually pretty close to that! the pattern is great (links below). I have had the skull button for a while with one person in mind... so it was nice to finally use it! I highly recommend this pattern to folks.
Ravelry info on my project: http://ravel.me/redredpanda/1mcs
Ravelry link to the pattern: http://www.ravelry.com/patterns/library/15-min-coffee-sleeve
User pattern/website: http://www.imfrayedknot.com/2013/12/02/frayed-knots-15-min-coffee-sleeve/