。
She sews all her own clothes herself.
Literal
She [topic-は] own-self [of-の] clothes [object-を] all self [by-で] sews.
自分自身 (oneself) emphasizes personal agency, and 自分で (by herself) at the end reinforces that no one else helps. 全部 (all) means every garment. 縫う (ぬう) is the verb for sewing. The triple emphasis — 自分自身の, 全部, 自分で — drives home her complete self-sufficiency in clothing. This is an impressive domestic skill being highlighted.