Indian cock capes are generally ungraded. Some are quite webby and useful for featherwings, particularly to overlay hen feathers. But the quality and character vary so widely, ordering them online is playing roulette, with similar odds.
I think grading is only applicable in sizing dry fly hackle, in accordance to the specific farmer's standard.
I have found some great featherwings from Chinese and Indian Hackle, better than from the big guys, but sorting through the bin, the rack, stack is an absolute. In general, the Chinese Hackle is best suited for the classic featherwing - I can find some nice skins white to dye - and the Indian are usually too small for a Glasso style, but they are fantastic for wings for bonefish.
As below, I have had better luck finding rooster capes in the generic chinese hackles with the curve and shape I want for steelhead flies.
Thanks for the thoughtful replies. I too have several Chinese cock capes and agree that they are great for Glasso-style feather wings. I was mainly curious about smaller featherwings and thought maybe India cock capes might work for size 4-6 flies. It sounds like the quality varies so much that online buying would be a gamble.