This page tests a product photo against the Shopify rules we could find, using the real pixels of your file. The figures were read on Shopify's own page.
Rules a pixel test cannot judge, such as what may appear in the photo, are listed beside the report.
What else to know about Shopify photos
Shopify sets no background or shape rule for product photos.
2048 x 2048 pixels usually displays best.
The limit is 5000 x 5000 pixels or 25 megapixels, under 20 MB.
Use one shape across a collection so your grid lines up.