As you have not given any details of your location it is obviously difficult to give you the best stores and websites to visit as some are country-specific. A list of different stores which are appropriate for different countries is provided below therefore;
- If you are based in the UK then you may wish to buy the mermaid flippers from Amazon. You will find the direct link to some mermaid flippers at www.amazon.co.uk/Finis-1-30-012-112-Mermaid-Swim-Fin/dp/B001.
Amazon offer a free delivery service and also you can return your item if you are not completely satisfied. - Again if you are from the UK then searching on eBay.co.uk would be a great way of getting the best deal for your mermaid flippers. Simply type in 'mermaid flippers' into the search box and you should find a variety of sellers who stock such a product.
- If you are based in the United States, then you could also use the US versions of the websites mentioned above. A direct link to the mermaid flippers at Amazon can be found here - www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&f. Similarly, heading to eBay.com and searching 'mermaid flippers' should find you some results also.
- If you prefer to buy the item from a shop rather than online then you can try toy stores such as Toys R Us.