すみません、もう少し大きいサイズの浴衣はありますか？ — Excuse me, do you have a slightly larger size yukata? (Ryokan · Traditional · Inn, Formal — to staff, JLPT N4)

Gesture & etiquette

Hold up the current yukata to indicate size, or make a gesture implying 'larger'.

Ensure the left side of the yukata is over the right side when wearing it. Do not wear yukata outside the ryokan in areas not designated for it (e.g., formal dining outside the ryokan).