Archies were designed to have a reasonably ‘snug / tight’ fit. If Archies are too long in length, the arch will not sit correctly on the foot. It is important to note, it is not a concern if some of the back edge of the heel hangs over the edge of the flip flop (as per the below image).
Of course, if your heel is completely over the edge of the heel cup and squashing down on the rim of the flip flop.
Ultimately, the most important thing is that the flip flop is comfortable and the orthotic sits in the correct position on the foot.
Please see the image below of acceptable overhang.
Please see the image below of too much overhang.
Archies are sold in unisex sizes. Choosing the correct size is important to ensure the Archies patented Arch Support Footbed is position correctly on the foot.
Please refer to the chart below to for your size in Archies.