Can't Change Product Image Size

I have the woocommerce widget on the main page of a Moesia theme, and after the recent update the thumbnails all switched to a very small size. Previously I was able to edit this in the woocommerce settings, or by using custom CSS. Currently I can’t do anything to affect the sizes shown on this one section.

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Hello there,

To fix this, please try the following css code:

ul.product_list_widget li img {
    width: 200px !important;
    float: none !important;

Thanks! This code resolved my problem.