Mermaid Tail Blankets from $10 and up @ TwinkleDeals
If you want thingamabobs such as Mermaid tails, TwinkleDeals is the best! It takes several weeks for it to swim overseas to reach you but the shipping is free. Everyone will want to laze around in one of these on Christmas Day!
To avoid paying additional fees for customs & duty, I'd order one that's under $20 USD. Select free shipping during checkout. (This means it will arrive via mail and not through a courier with potential additional fees.) You can also select to pay for your order in CAD currency.
You can choose from a beautiful selection of colours and styles of mermaid tail blankets. They're created for everyone in the family, right from babies, ($10.13 CAD, from from $29.34 CAD), for boys (shark tail! $22.64 on sale from $56.61) to gorgeous rainbow coloured fish scale accents ($27.26 from $60.29) and more.
You want more?? (You were singing this song anyway, yes?)
Shipping is free!