We have both silkies, and silkie/bantam chochins here, and had 2 that looked just like yours. Way meaner and greedier than the little silkies so I'm phasing them out.Considered bantam, but there are Largefowl Silkies. I like the LF.
Bantams are supposed to be no more then around 2lbs maximum for hens, & 2.25lbs for roosters.(Silkie Bantams)