No they don't. for every planet their size varies.
The planets of our solar system are most definitely NOT all the same size.
Uranus and Neptune are roughly the same size.
yes there is 2 planets but there are also dwarf ones too.
There are no planets that we know of that are exactly the same size.
No
No.
I guess the closest planets in size are Earth and Venus
yes because they are nearly the same size and same colour so they are twin planets
Planets are larger and more massive than asteroids, but very nearly the same size and mass as planets.
Neptune and Uranus
Yes
Mercury and Mars are the two planets that are almost the same size in our solar system. Both planets have a similar diameter, with Mercury being just slightly smaller than Mars.