Elastics on a buckle can cost around £6 each on average. Just bring in your shoes to a repair shop to mend them. If your shoes need further repair, you can expect to pay for each kind of repair. Stitching, stretching, patching, sole repair, heel repair all have corresponding prices.
Elastics Repair On A Buckle (each)
Average Price: £6
Top Price: £12
Shoes with buckled elastics may not be a very common style but cobblers can replace the elastics and buckles if you ever break them.