I ask because, given the size of your continent (which appears to stretch from the 30th to 60th parallels), if this planet were the same size as Earth, then this continent would appear to be much larger than France (which is about 211 sq. miles vs. 220 sq. miles roughly for this continent by your figures).
By my admittedly rough calculation, if your continent is about 550 miles across, then the circumference of your planet at the 60th parallel is somewhere between 3,000 and 4,000 miles (based on my very rough finger-ruler measure of the number of times you can count the width of this continent across the 60th parallel). Mathematically, the circumference at the 60th parallel is 1/2 of the circumference of the planet at the equator, which gives you a planetary circumference of between 6,000 and 8,000 miles. The Earth, on the other hand, has a circumference of almost 25,000 miles.