na-adjective
bulky; large and unwieldy
Describes objects that are physically large, thick, or take up a lot of space, often implying heaviness or awkwardness to handle. Used as a na-adjective.
このジャケットはバルキーで、スーツケースに入りにくい。
This jacket is bulky and hard to fit into a suitcase.
バルキーな荷物は宅配便で送ったほうがいい。
It's better to send bulky luggage by courier service.