Syns in chocolate coins!

Hi all, I've just downed a chocolate coin (Thorntons- about 4cm in diameter!) I've no idea how many syns were in it, although I knew I could afford it! I'm estimating 2, as in a Quality St or 1 chunk of Cadburys caramel! What do you think? I haven't got any scales sensitive enough to weigh it either! Perhaps 5g?!

I always guestimate about 2 maybe three for bigger ones then make sure I definately do not go over 15 that day.