Any of a literally infinite variety of sizes, as long as the length is in the interval centimeters. The width is in the same range and the two are related by the relationship .
A couple of examples: It could be 10 by 12. It could be a square on each side. It could be a very long and narrow 0.1 cm by 1200 cm. or even longer and narrower 0.0001 cm by 1,200,000 cm. If you make it narrow enough, you could have it long enough to reach the outer reaches of the solar system and beyond. Or it could be anywhere in between.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it