Diameter top 26 cm, bottom 19 cm

The indication of 24 cm at the bottom is of course wrong, as is so often the case on Galaxus. As already answered, the diameter at the bottom is approx. 19 cm. We use the pan on the middle hotplate (18.5 cm).
At the top, the diameter is measured inside at the edge, where it is actually 24 cm. So you need a 24 cm lid.