This is a a sankranthi rangoli (pongal rangoli), basic dot structure is 21 x 7 with some dots extended on all 3 sides.
This is a kolam that is actually 21 x 11, with 5 x 1 extended in the centers from all 6 sides of the hexagon created, due to lack of space I have done the 5 x 1 extention only on 4 sides but not on top and bottom.
A rangoli made from 13 x 7 dots, one of my daily rangolis.
A regular kolam which I daily put in front of my house entrance.
This is a 21 x 1 dots rangoli, center line of 21 and then followed by 19, 17, 15 to 1 on each side. Very easy and beautiful.
I drew Santa Clause for XMAS rangoli, specially for my son.
It is a 11 dots 11 lines kolam.
Submitting the same for Margazi kolam contest.