The fishtail was cut and sewn, turned right side out, and then sewed to the back dress panel. After attaching the fishtail, I rounded the dress hem so...
Our daughter is newly obsessed with mermaids and wanted to be one for Halloween. My husband and I agreed on these design criteria: it had to be age-appropriate (no shell bikini bras for our 3-year old!), it had to allow for free movement (she’s very active) and there could be no references to Ariel of Little Mermaid fame. I couldn’t find a tutorial online for a mermaid costume that we both liked, so here’s what we came up with by winging it:
Step 1: The base
The base of the dress was a printed blue cotton fabric with a shirred top. It was a quick shortcut to get the basic shape and structure -- the scales were sewn directly to it. (It happened to be Little Mermaid fabric, so I had actually had to cut Ariel off the print at the bottom...we took some pleasure in this)