Still not sure what to buy the favorite dinghy sailor in your life for Xmas? Have you looked at his or her PFD lately? Is it showing signs of fading and wear? Is the zipper broken?
If so, show you care by buying your dinghy sailor the gift that might save his or her life some day, a new PFD. Personally I prefer the type with a side zip and a front pocket. Two PFDs that seem to get good reviews and are extremely popular on the dinghy racing scene are the Lola by Lotus (yellow one on the left below) and the Retroglide Avenger by Extrasport (blue on the right).
If your dinghy sailor happens to be 6'2" tall and around 182 lbs then the Large size should be a good fit for him (or her).