I like designing patterns for flowers and butterflies but I also do little mats for my groups, who meet monthly, and for workshops. This is one of the patterns I did for a workshop on 'Playing with Picots'.
You have to use a picot gauge for a Celtic picot (see www.paradisetreasures.com/okp.html) and it has to be just the right size. If it is too big the 'knot' will be droopy and if it is too small it won't show properly and could pull the design out of shape. I found that a round picot gauge worked better than a flat one( cut from a piece of card or plastic). For this pattern I used wooden dowelling 3/16th inch (.4cms) diameter and cut it into pieces about 2 inches (5 cms) long for the ladies at the workshop.