Its a little too young to tell. But, when they get older, here are some things to look for:
Silkie females will have puffier, rounder crests. Their combs will be smaller, and they will have a squat stance. Males, though, often have "streamers", which are longer, thin feathers projecting from their crests. Males will also develop their combs quicker, and will be taller and often larger than the females.
This Silkie is a rooster. See how large the comb is?
This is a female. The comb and wattles are smaller, and she has a more feminine head
This Silkie rooster exhibits "streamers" Streamers are the thin, longer feathers on the back of the crest. Females do not usually have them.
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This shows the puffy crest and squat stance of a female A rooster stands taller and has a smaller crest.
Hope this helps! Post some more photos in a few weeks.
