The scale is 1 inch to 1 foot. This is the standard scale used by the the Americans from where a lot of the doll house miniatures originate. The basic shell to the house is made from 9mm or 3/8th inch plywood. The plywood should have as many plies as available and in terms of quality in descending order, use
- Marine ply
- Beech faced ply
- External ply (used by the construction industry for temporary walls, concrete moulding etc)
- ordinary ply.
The quality sets the stability of the finished model. The base is made from 1.5 x 7/8 th inch hard wood. Strangely, the wood shop I have been using has the ply sheets in imperial sizes, 8 ft x 4 ft x 3/8 in.