Hi I have an 8mth old and he is loving 3 solid...

Hi I have an 8mth old and he is loving 3 solid meals of mashed vegies a day. I would like to start finger foods but I am not sure how big veggies, toast, cheese etc should be. I read that people say cut into "chunks" how big is a chunk? What about toast/sandwiches? How big do you cut them? What spreads etc do you put on them? Can you please also suggested great finger foods that have gone down well with your baby. All advice appreciated. Thanks