"Strappy" is often used to describe the style of shoes or sandals that have thin, often decorative, straps that wrap around the foot or ankle. If you're looking for alternative words to describe this type of footwear, you could try "multi-strap" or "caged" for shoes that have several straps crossing over each other. "Lace-up" or "tie-up" could also be used for shoes or sandals that have straps that wrap and tie around the ankle or calf. For a more elegant tone, "ankle-wrap" or "gladiator" could be used. But if you are looking to keep it simple, "strap sandals" or "ankle-strap shoes" could be a good option too.