We suggest to keep your content within 1.5 MB measurements, so your customers could have it displayed as fast as possible.
Given the fact that we live in the era of high speed Internet, customers want to see the products displayed on the page almost immediately. Therefore the longer is the loading time of the page, the more customers lose the interest in buying a certain product.
According to research, the loading time should not exceed 5 seconds. This determines the optimal size for rich marketing content.
Note:
On the top of the edited .pdpd Crafter page, there is a counter displaying current size of the content.
Refer to this tool to check if the optimal size of the assets was exceeded: