I received the stamps from Royal Mail and was really caught by surprise by the size of the stamps!
I'm not a great observer so I won't be able to answer the riddle!
Anyways, I've rounded up some more Christmas stamps. It's really getting me into the season. I've already ordered most sets to decorate my Christmas cards again this year!
Faroe Islands
The stamps represent Faroese Christmas Carols. Names are on the stamps (above the country - Foroyar).
Denmark
Another beauty.
Norway

Norway has gone with an embroideries theme: Reindeer on the left, a candle with a mistletoe on the right. Stamps are normal self-adhesive.
Switzerland
A diverse theme with a nice combo of blue and white to give that wintery touch.
I've already seen the 2 Winter / Christmas sets from Sweden (brochure I get in the mail), but they're not on the website yet. However, they are great, so keep your eyes open. Hopefully by the end of the week, they'll appear online.