What a cheerful and charming set of tables. The typical kidney shape and tapered legs certainly place it in the 1950s. The colours and the formica tops are also very recognizable for that period.
The tables are stable and in good condition. The colours are good with normal signs of wear, but the gray table does have 1 minor damage. See the pictures.
The dimensions are those of the largest table. Quite large for a nesting table by the way.
H x w x d = 48 x 78 x 50 cm / 18.9 x 30.7 x 19.7 inch.