Skylight Sizes

Standard Sizes

      
Internal metric opening
size (mm)
Approx imperial
opening size*
(inches)
Actual area of light
(m2)
Ventilation area
(m2)
Square models
400 x 400
16 x 16
0.160
0.082
550 x 550**
22 x 22
0.302
0.125
600 x 600
24 x 24
0.360
0.098
800 x 800
32 x 32
0.640
0.170
1000 x 1000
40 x 40
1.000
0.137
1200 x 1200
48 x 48
1.440
0.161

Rectangular models
400 x 700
16 x 28
0.280
0.132
400 x 1000
16 x 40
0.400
0.170
550 x 800**
22 x 32
0.440
0.128
550 x 1100**
22 x 44
0.605
0.165
600 x 800
24 x 32
0.480
0.108
600 x 1100
24 x 44
0.660
0.138
800 x 1100
32 x 44
0.880
0.131
800 x 1400
32 x 56
1.120
0.244

Rectangular models available flashed on the long side.

* Use only as an approximate guide
** Tile roof only