Planetary StatsThaelin's circumference at equator:125,000 miles (201,168 km)
Thaelin's circumference between the North and South Poles: 125,000 miles (201,168 km)
Average Distance from Thaelin to its' Sun: 93,000,000 miles (149,668,992 km)
Average Distance from Thaelin to its Moons: Mond 250,000 miles (402,336 km), Tsuki 200,000 miles (321,868.8 km), Kamar 300,000 miles (482,803.2 km)
Water vs. Land: 55% Water, 45% Land
Planetary Age: 5.23 billion years
Atmosphere Content: 55% nitrogen, 44% oxygen, traces of carbon dioxide, water, and other trace elements
Revolution around Sun: 1,827 days (Thaelin Year)
With 5 times higher circumference, and being merely as dense as Earth it should have 5^3 Earth masess - read 125 masses, clearly heavier than Saturn. The gravity on the surface of that planet should be 5 times higher than on Earth - read: evolution would favor dwarfs
You would have also ignore that planet with mass 10 times higher than Earth's should be able to maintain hydrogen in its atmosphere and shall transform to a gas giant.
Stop spoiling fun?
Actually there are quite a few crazy worlds possible that would allow existence of sentient life and good game setting. Ex. Tidally locked planet around a red dwarf; planet on an eccentric orbit; moon of a gas giant; planet in system with more than one star; supper earth or clearly a smaller planet; planet with very high tilt.