na-adjective
pocketable; compact enough to carry in a pocket
Describes small electronic devices, books, or accessories that fit easily into a pocket. Often used in product descriptions.
この電子辞書はポケッタブルで持ち運びに便利だ。
This electronic dictionary is pocketable and convenient to carry around.
コンパクト is a broader term for 'compact' or 'small-sized', while ポケッタブル specifically emphasizes that something fits into a pocket.
Borrowed from English 'pocketable', a combination of 'pocket' and the suffix '-able'.