God understood that leaves are not ideal as garments and clearly Adam had no idea what a garment was in the first place. God knew they were both naked however; can we say that the leaf garments concealed rather than accentuated their shame? Here are some examples.
Genesis 3:7 And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
The numbered graphics represent three different types of leaves. NUMBER ONE is monstera, sometimes called the "Swiss cheese" plant, which if actual leaves would hardly be effective in terms of modesty. NUMBER TWO is a fig leaf print. Equally useless, more of which later. The third print is NUMBER THREE. Palm fronds. The only reason for Eve to wear these would be to stand in the breeze and flutter. God did not allow such clothing for long.
Genesis 3:21 Unto Adam also and to his wife did the LORD God make coats of skins, and clothed them.
As you can see, God's designs using animal hides would be much more modest. If, like the Californians, you thought nude fishing was acceptable or prancing around in palm fronds there would be something wrong with you. There is nothing wrong with God however as my next examples demonstrate.
There are two NUMBERS SEVEN. Do not use search functions to look for men in fig leaves. I was reluctant to include these but after reflection remembered that God did not neglect to describe a nude Adam – for a reason. Do I really need to indicate in what way leaf tailoring was inadequate? The pictures have been redacted for modesty but the leaves' positioning remains clear, just as God explained.
Moving quickly on, we are reminded that God actually made clothes (from animal hides) for Adam and Eve. Remember that it was not until God arrived to see what was going on
Genesis 3:8-10 And they heard the voice of the LORD God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the LORD God amongst the trees of the garden. And the LORD God called unto Adam, and said unto him, Where art thou? And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself.
that they became afraid of nudity, prior to which they'd been dressing up in leaves, more or less as indicated, for reasons best left to the imagination. Not that much imagination is needed. Lamech was Adam's great-great-great-great-grandson. This informs us about tailoring and/or dressmaking options available to God. A quick note to the Californians: an option of nudity was not offered.
Genesis 4:19, 22 And Lamech took unto him two wives: the name of the one was Adah, and the name of the other Zillah ...and Zillah, she also bare Tubalcain, an instructer of every artificer in brass and iron: and the sister of Tubalcain was Naamah.
In those illustrations, variations of animal skin garments are shown. Which species were chosen by God for His purpose is not covered in the historical record so I've included three nice ones. Both the EIGHTS show designs for men and the NINES for women from four different species God could have used. The leather trench coat however includes a feature not available back then: press studs.