women - What was the size of the כָּתְנוֹת עוֹר?

What was the size of the כָּתְנוֹת עוֹר (garments of skins for Adam and his wife) (Genesis 3:21)?

By "size", I mean, was the garment just covering the area that an underwear would cover, or was it a shoulder-to-feet covering, etc.?

Please provide a rabbinic source for an answer.