平ひらゴムMeanings1nounflat elastic; sewing elasticRefers to flat, ribbon-like elastic bands commonly sewn into cuffs, waistbands, or other garment parts.このパンツのウエストには平ひらゴムが入はいっています。These pants have flat elastic in the waistband.手しゅ芸げい店てんで幅はば広ひろの平ひらゴムを買かった。I bought wide flat elastic at the craft store.