Any widgets embedded into post pages in the Miramar theme can be sized at 850px. Sizing anywhere from about 750-850px will also look fine!
If you have purchased our Shop the Post plugin, most affiliate marketers have built their widget code to automatically reduce down in size to fit any container the widget is featured in. Therefore, your widget should automatically resize when it appears on the Home Page.
rewardStyle and ShopStyle users may wish to experiment with product size, or (for ShopStyle) adding additional columns to their widget to change the size of the products and how many items appear within the widget, especially when it is featured on the Home Page.