I picked up this mini box of Celebrations today to show an example portion size of chocs that you can eat while staying on plan.
This mini box cost 94p at Asda and contains 8 sweets (one of each variety).
Not only is this a controlled portion, meaning you can't aimlessly much through more than you intend to, but also it has a nice range of chocolates. Ideal if, like me, you get stuck deciding which choc to use your syns on each day.
On the Slimming World App these are 2 syns each, so this box will set you back 16 syns.
I know we are quire far off Christmas, but these would be ideal for festive evening snacking. Nearer christmas they usually do Roses and Quality Street minis too.