Full thickness excision

I have a provider who sometimes uses a punch biopsy tool for a full thickness excision of an entire lesion. Example - .7 cm lesion excised using a 1 cm punch tool. Is this enough information to determine the margin is .3 cm. Total size of excision would then be .7 +.3 x 2 = 1.3 cm. or should the size of the excision be 1 cm?

Vicky

Full thickness excision