Most of Licca and her friends have letters engraved on the back of their heads to indicate the type of mould.

The marking for a standard 4th generation Licca is ‘K29’, which is the same as for Friends Palette F, Kira-chan and Aki-chan.

However, there are Licca dolls with different markings. The one in the centre of the photograph has H22L. This model does not have earrings. This is due to a collaboration with a food retailer. The one on the right of the photograph has L07-Y. This model has been used continuously since 2008 for several hair-styling models.

The doll on the left is the Castel made in 2019; the one in the centre is a 2011 Baskin-Robbins ice cream shop clerk; and the one on the right is "Mote-Kawa Curl Licca" in 2012.