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Degloving injuries of the thumb pose a significant challenge as replantation is usually unsuccessful. A 60-year-old man was transferred to " Queen Victoria Hospital NHS Trust " four hours after having his left thumb completely avulsed at metacarpophalangeal level. The anastomosis repeatedly failed during urgent replantation and a distally based pedicled RFF was utilized. To achieve accurate flap design, we used the amputated part as a template for the missing tissue. After a longitudinal cut exposing the inner surface, the thumb was placed flat on top of a clean gauze package which was used as a paper template for the skin paddle; the flap was subsequently sutured without tension. Since the circumferential soft tissue envelope is three-dimensional, accurate designing of the flap on the forearm is vital. We propose a useful technique using the amputated part to enable a precise estimation of the tissue requirements to reduce potential complications related to flap inset., Competing Interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© 2022 The Author(s).)