Need an opinion about Os

Help!  My handwriting books are all in storage...except for a few.  I have not been able to find out the trait for Os that are very open on the bottom.  I know the open tops are open communication, etc. but what about very open on the bottom?  The sample I saw was not a whole page but a good sample over all.Her over all the handwriting is very rounded and large.  I feel like this peron communication has fallen out the bottom on her.   Her pressure was light.