This tutorial includes templates which will help you with the sizes and shapes. Click on the 'Templates' button below to download them. 

37.

Dust the edges of the leaves and the indentations with green dust. Apply a small amount of glue on the branches where you want the leaves to go. The branches can’t be dry, otherwise it will be difficult to stick the leaves.

After you attach the leaves, leave the branches to dry for some time. They should be firm but they can’t be completely dry because you need to insert the wires (see step 39).