The size/color of the comb/wattles is really imprecise in Silkies. I have some girls with large combs and boys with small combs.
Silkies also mature later, your birds still look very young. It can take months and months for them to come into their full feathering. Some of the wing and tail feathers will look harder. Ideally, the foot feathering should go all the way down the outside of the leg and to the outer 3 toes. Even if you breed two bearded parents, you could end up with some non-bearded offspring, so a lot of Silkies are non-bearded, and they may grow beards as their feathers grow in more.
Sexing Silkies based on the topknot is a pretty good indicator, but still not completely accurate. The girls will have a rounder, more perfect little puffball on top, often completely covering their comb and eyes. The boys have a smaller crest, with a slicked-back Elvis look that leaves their eyes more visible and they will have "streamers" - longer feathers poking out of thier crest towards the back. Still, your adorable little birds haven't come into all their feathers yet and it may be a while longer before you'll be able to differentiate this way.
The most accurate (and most frustrating, since patience is NOT one of my virtues) is to wait until they start crowing or egg laying. For me, I had bought 20 Silkies as my first batch and they all began laying around 6 months, so I was getting about 3-4 eggs per day, but I had no idea who was laying them, so which ones were the girls??? About a month after they began laying, one at a time, they all went broody - A HA! now I know for sure who my girls are! Of course, some of the boys were crowing by now and growing spurs...so that helped, too.
Your little birds are absolutely adorable and so clean! I think they're just perfect, so don't worry! I love my little Silkies they're such goofy little birds and everyone who sees them just loves how unusual they are.
