Tailoring Tradeskills: Robe Pattern Broken...?

[Axlrose]

Last night, one of my young characters (after finding a small stash of spider silks with a vendor) decided to create some raw silk armor for personal protection. Going by fading memories of old from Live, I bought a robe pattern thinking that two swatches combined makes a robe. I was wrong - I need a tunic.

Looking over the Wiki pages for Tailoring, I do not see any patterns that require the robe as the possible chest piece but all as tunic.

I could be wrong; but what exactly is the robe pattern used for then? And looking at the technical section, it appears there is no graphics for raw silk?

Thanks!