Khloe also joked about the size of Kim's huge engagement ring (20.5 karats and rumored to be worth more than $2 million.) "I went roller skating on it earlier!." Khloe joked. "Sad thing is I got tired, jumped off! It was just too big2 skate the whole thing."But how does Kim's ring compare to the sparkler Khloe's husband Lamar Odom proposed with? "Kims ring gave birth to my ring!," Khloe tweeted. "LOL but my ring is perfection! Its from my Lammy."