I used a big taawa and an aluminum small mug to spread it. Well... It took 5 to 6 dosas to be this perfect. Not all of them were like this. I clicked the best one @Latha Nair
U should adjust the heat of tawa. & how it spread. If tawa s too hot,sprinkle some water on it. If batter sticks at the bottom,use a half cut onion with a fork. Dip in oil & spread on tawa,before spreading batter. If u could make dosas like the one u presented, u will definitely do the rest.
O wow dear... Thanks for your tips. It means a lot to me. I can hardly make 4 to 5 perfect dosas. @Latha Nair