Sandals are believed to be the first rigid shoes created and were an important social status indicator for Roman citizens. Those without any footwear were considered poor. Sandals were the most common footwear because of the hot Mediterranean climate in Rome. Roman sandals consisted of a stiff sole attached by leather cords or straps. Nowadays Roman style sandals have been reincorporated into fashion and can be found at a variety of prices. Making an elaborate Roman sandal can be involved, but a basic Roman sandal for a quick costume can be done using few materials.
Remove the thong part from your left flip-flop, leaving only the sole. Repeat this step on the other flip flop.
Trace both sandal soles on the leather sheet. Cut out the patterns and align the leather evenly to the inside of the sandal. The left foot pattern goes on the left flip-flop and the right foot pattern goes on the right sole. Stitch the edge of the leather pattern to the edge of the sandal sole all around.
Spray paint both flip-flops with the brown leather textured spray paint. Spray all over the flip-flop. Allow them to dry.
Attach one end of the first leather cord to the left side of the sole with thread. Attach the second leather cord to the right-side of the sole with thread. Repeat this step with the other sandal.
Place your feet on the corresponding sandal sole. Cross the left cord over the front of your foot, and then cross the right cord. Criss-cross both leather cords up your leg. Tie them.