the ugar's length is around 44.5 kilometres. its drainage basin is around 328 km2. its largest right tributaries are: pljačkovac, ilomska, kobilja, zirin potok and kusin potok (ziro's and kuso's creeks). the left tributaries are the creeks: namely lužnica potok, dedića potok, andrijevića potok, bunar, oraški potok, and kukavički potok.