- Seeded or picnic watermelon, are the iconical ones, rounded and ground rind with red flesh and black seeds, weighing from 6 to 20 kg. Popular ones are Allsweet, Black Diamond, Charleston Gray, Crimson Sweet, and Jubilee.
- Seedless, popular as convenient, their weight is around 6 kg. Popular varieties are Crimson, Jack of Hearts, King of Hearts, Millionaire, Nova, Queen of Hearts, and Trio.
- Icebox watermelons are small and can fit inside a fridge. They are still weighing from 2 to 7 kg though... Sugar baby and Tiger baby are two popular ones.
- Yellow/Orange per their flesh color, weighing from 4 to 14 kg The main ones would be Desert King, Tendergold, Yellow Baby, and Yellow Doll.
In Japan, some former grow watermelons in glass boxes to give them a cubical shape. Easier to store in the fridge, the price can reach 80 USD.
Careful, the seedless watermelons often contain small white edible seeds, they are still toxic for cats.
Muskmelon or Cucumis melo
The Yubari King melons are hard to find as they grow in a small region in Japan. Said to be the juiciest and sweetest melon in the world, a perfectly proportioned pair of these can cost around 20,000 USD.