Looking through the sample request page, I can't figure how I can send in requests for just specific colors or sizes of a style.
Here are the steps to request samples for specific style Colors and Sizes:
From within the Style, click on the BOM page
Select "Bill of Material" link in the left hand navigation
Set Color as Dimension 1, and add Colorways.
For Dimension 2, Select "Size"
Select the Size Range
Select the Sizes the Style is developed in
Save and Close the BOM to return to the style workflows.
Go to the "Sample Request" Folder in the left hand navigation
Select the Sample template, BOM, and Measurement Spec
Indicate Colors and Sizes of the requested Samples
Select the Agent/Vendor/Factory that will be submitting Samples
Click "Generate" and Close
Here is the Tip of the Day video to further explain: