Check to see if your photo will work well with the oval layout:

For a good result, there must be sufficient background area in the photo for the oval shape to fit.
Otherwise parts of the image will be lost.

Compare your photo to the examples below to see if your photo is a good candidate for oval masking.

This image is good for oval masking. Plenty of space around the dog.

Horizontal oval mask looks good.
Vertical oval mask also works well with this image.

This image is poor for oval masking. Very little space around the dog.
Parts of the dog are cut off with the oval mask.