Pro rata , for example 2.5 x 2.5 side will be 3" x3" etc
Fold as above photo.
The backing papers were chosen from the packs below
I rounded the edges on the backing papers at the top of the main piece
And at the left edge of 'steps'
The images except for the little boat , gone to the beach tag (all from Ahoy there)
And a birthday sentiment I had in my craft box already.