Tiara yachts 1989 or 1990 27'or 28' replacement cushions, bolsters, engine cover and other parts as pictured.

Most were re-upholstered and never installed, not sure the model boat, the pictures of a boat may be similar
 measurements are about:

2 curved bolsters double rib 80"x11"
engine cover 6'x2'
3 cushions 27"x22', 1-19"x22"
2 bolsters 30.5"x8"
2 side bolsters with inserts 48"x9"
2 angled side bolsters
square piece with holes 17"x19"
back rest ribbed 23" x11"