To import dimensions for your products when an order is imported into ReadyToShip, you'll first need to create Metafields in your Shopify store.
In your Shopify store, click on Settings in the bottom left corner.
Then click on Metafields and metaobjects in the left menu.
Click on Products,
then Add Definition.
You'll need to create one definition each for Length, Width and Depth.
Enter the name for your metafield, eg. Length.
Select # Integer from the dropdown list in the Type field.
Take note of the metafield "key" as shown in the highlighted box below. This is the name you will need to enter in your store settings in ReadyToShip. Then click Save.
Once you have set up one metafield each for Length, Width and Depth you'll need to populate each of those dimensions in your products so that when we import orders the dimensions also import.
Products can be updated individually or in bulk.
How to bulk edit product metafields
Go to Products in your Shopify admin
Select the products you wish to edit
Click Bulk Edit
Click Columns - you can deselect the columns you don't need to see, so that your screen is more manageable
In the same dropdown, scroll to Metafields, select the metafields you want to edit (in our case Length, Width and Depth) so they show on your screen. Click anywhere on screen to close column selection box.
Populate your metafields with the dimensions data (enter numbers only, and it must be in cm), then click Save