Healthy Betta Body Type, What To Look For When Picking One Out?

[keithp]

I was wondering is there a guide on picking out bettas judging by body type (length of fins and body stockiness) I was looking at females and noticed some have thin bodies (meaning not wide) with fins proportionate to their size. Then I noticed females who's body were very wide with smaller than usual fins, I was amazed they could swim properly with such tiny fins and not be weighed to the ground. Also some males with thin bodies and fins dragging on the ground from being too long.

So is there a guide showing what a healthy body type is like for all types of bettas.