Solution

164198

First name
theo
School
pierrepont Gamston primary school
Country
Age
0

There are four of each coloured panes (green, purple, orange and blue).
The shape of them look like an irregular trapezium.
I think the size is 5 feet tall and wide.
To make a sensible estimate you could use the size of rectangular windows and trees reflecting it or a rough estimate of the size of its panes. The rectangular windows around are smaller, and you can guess that they are a bit smaller than normal windows but not really small.