Image issues

Hi,

1) itail.in

Some images are blurred and some are not.How do we fix this? I want all the images of this current image display size.

2) https://itail.in/product/oh-my-goddess/

Some images show without top and bottom. How do we fix this? I am happy with the current image display size.

3) https://itail.in/product/shami-soft-lightweight-handmade-cross-body-bag-for-ladies/

The image does not has fixed height and elongates or contracts as per image size. I want it fixed height.

Thank you in advance.