Three cook-sets: an Optimus 88/124, a Groninger, and a Sigg Tourist. Kinda nifty to see these three sets all at once, to get an actual feel of size. The Optimus has a 5” skillet/lid, and .8L pots,,, the Groninger has a 5 7/8” skillet/lid, and 1 liter pots,,, The Sigg I’m thinking has 1.5 liter pots. (The Trangia mini 28-t, not in the photos, also has a .8L pot.) The Groninger is not twice as heavy as the Optimus, but it’s so close it may as well be.