Help with Sizing and Color

hello! i am about to get the oura ring and needed help besides the standard internet stuff. so i got the sizing kit and im in between a 12 and 13. the 12 is snug but not too tight around my knuckle and 13 is fairly loose but not falling out. what would yall recommend? second, im stuck between the rose gold, gold and ceramic in the petal color. i have heard about the rose gold patina and the gold changing colors. i also heard about the ceramic cracking. lastly, i’m not sure the ceramic fits different. any help would be appreciated 🙏🏾☺️