I'm not sure if you mean the size of each planet or the size of what all of the planets together would be. I can do the first one. The second one is possible, but would involve a lot of math with some really big numbers.

The variable in your question is the word "size." What do you mean by size? Equatorial circumference or mass? I will give you both. I'm also going to give the measurements using the metric system, since that is the standard scientific unit system.

Mercury: Circumference = 15,329.1 km Mass = 3.3010 x 10^23 kg

Venus: Circumference = 38,024.6 km Mass 4.8673 x 1024 kg

Earth: Circumference = 40,030.2 km Mass = 5.9722 x 1024 kg

Mars: Circumference = 21,296.9 km Mass = 6.4169 x 1023 kg

Jupiter: Circumference = 439,263.8 km Mass = 1.8981 x 1027

Saturn: Circumference = 365,882.4 km Mass = 5.6832 x 1026 kg

Uranus: Circumference = 159,354.1 km Mass = 8.6810 x 1025 kg

Neptune: Circumference = 154,704.6 km Mass = 1.0241 x 1026 kg

Those are the 8 planets of our solar system. NASA has officially recognized 5 dwarf planets in addition to the 8 major planets listed above.