These are the tiles I found for the new en suite bathroom..... just one course of mainly field tiles the same background colour with a few of these interspersed here and there. There are other little characters...but, these two are the nicest of the grouping. Maybe a row of little "liner" tiles above them... I've never heard that term before ..I've always thought of them as trim ... but, there are some with tiny bumps on them that remind me of bubbles.... they could work great.
I especially love the lily pad one ... aren't they cute?