What type of breed are these chickens

[michellemire]

 

[WyandotteIndeed]

They look like Japanese bantams or a mix of mostly Japanese. Can't tell from the photo how long their legs are. Just looking at the profile and that distinct upright tail carriage.

 

[BantamLover21]

They look like Japanese Bantam mixes, or possibly Seramas.

 

[Wyandottes7]

I'm thinking that they are Serama or Serama mixes.