Recommended Image Sizes for Themes

Homepage Hero slider image size = 1200 x 900px
Portfolio section featured image size = Optimum image size is 1200 x 900px. Use image of any dimension with the ratio of 4:3
Testimonial section image size = 148 x 148px
Post section featured image size = Use image of any dimension with the ratio of 4:3
Team section member image size = 268 x 268px
WooCommerce product image size = 300 x 300px
Brand image size = 146 x 105px
Inner pages image size = 1200 x 900px

Homepage Hero slider image size = Optimum image size is 1920 x 1080px. You can use image of any dimension with the ratio of 16:9
Ribbon section image size = Use image of any dimension with the ratio of 4:3
Portfolio section featured image size = Optimum image size is 1024 x 682px. You can use image of any dimension with the ratio of 4:3
Team section author image size = Optimum image size is 600 x 800px. You can use image of any dimension with the ratio of 3:4
WooCommerce product image size = 400 x 400px
Post section featured image size = Use image of any dimension with the ratio of 4:3
Inner pages image size = 1200 x 900px

Homepage Hero slider image size = Optimum image size is 1920 x 1080px. You can use image of any dimension with the ratio of 16:9
About section image size = Use image of any dimension with the ratio of 4:2
Portfolio section featured image size = Optimum image size is 600 x 400px. You can use image of any dimension with the ratio of 4:3
Team section member image size = Optimum image size is 269 x 404px. You can use image of any dimension with the ratio of 3:4
WooCommerce product image size = 366 x 366px
Testimonial section image size = 79 x 84px
Post section featured image size = Use image of any dimension with the ratio of 4:3
Inner pages image size = 1200 x 900px

Homepage Hero slider image size = Optimum image size is 1200 x 900px. You can use image of any dimension with the ratio of 4:3
Portfolio section featured image size = Optimum image size is 434 x 322px. You can use image of any dimension with the ratio of 4:3
Testimonial section image size = Optimum image size is 268 x 268px.
Team section member image size = 480 x 720px
Post section featured image size for Homepage and inner page = Use image of any dimension with the ratio of 4:3
Inner pages image size = 1200 x 900px

Follow these image sizes and show your site with a better look.