• leather
• waxed poly thread
• a scavenged metal button, probably from some old jacket or other
• a couple d-rings, probably cheap steel but coated so they look gold-ish
it's this big:
• this pouch is 10″ high
• & 9″ wide
• with a gusset down the right side & across the bottom
• the phone in the picture is an iPhone SE in an otterbox • if that helps you visualize things