Anybody? :)

I'd go big. What colors do you like? Since it looks like you have a little one, I'd go for a patterned rug. Check out esalerugs.com or rugsusa.com

Thank you for the input. The painters tape is a great idea.

My favorite rule about rug shapes:

4. Square rugs are for square rooms. That is all. Round rugs are for foyers/entries or kids room/family rooms that are more playful (or round shaped rooms in case you live in a Yurt).

From

https://stylebyemilyhenderson.com/blog/video/tips-to-choosing-the-right-rug-size

And here's a roundup of 52 rugs, if you see any you like. I love the roundups her blog does; I find it so hard to look through the thousands of items available. At least, here you can have a starting point.

https://stylebyemilyhenderson.com/blog/52-timeless-patterned-rugs

I can't tell if your room needs a 9x12 or an 8x10, but here are some 8x10's under $500

https://stylebyemilyhenderson.com/blog/design-mistake-2-the-too-small-rug

Thanks Kiko! Those are helpful links!

I really like your room and furnishings! I always prefer oriental style rugs. I think that your room will instantly look warmer if you use only lamps and not that overhead light.