All these little bake additives usually come in small sachets, about 4 or 5 in a plastic wrap. It should be a standard size/weight, so quantity of half a pack will be standard, also.
1 UK ts (teaspoon) = 5 ml (ml = milli liter or mL in German )
1 UK TS (Tablespoon) TS = 15 ml and
1 Australian / NZ Table spoon TS = 20 ml
German recipes don't use TS they use TL which are Tafel-Löfel. Equal to our desert spoons, or about equal to 2 tea spoons or 10 mL (<- I think I am correct there)
Problem is the volume associated with it. Tratitionally it is TL = 5ml, EL = 15ml. Like Betty Bossi)/de/Angebote/Detail/24039?title=Betty-Bossi-Messloeffel&key=Kampagnen_Detail_4aa29598-938a-4bfe-8b1b-a6be6fca045e_32) .