Wraps are inherently difficult to measure. Length is measured with a soft tape in hand. The tape measure I use is 100 ft, so it is done continuously. I square the wrap when measuring width (so as not to measure diagonally) and flatten the wrap without stretching to get the width. Thickness is measured with a micrometer. This is highly dependent on user. Thicknesses should be used in comparison rather than as absolutes.
My first Zara was a beastly Blueberry that took much work to soften and never was easy to wrap with. Zara Blossom was easy to wrap with immediately. Made with mercerized cotton in a new factory, Blossom is soft and moldable and is more glidey than grippy. Unlike previous Ellevills, Blossom is also free of weaving flaws.