No paper is an insulator.
A typical A4 paper is approximately 0.1 mm (100 microns) thick. The weight of the paper does not directly correlate with its thickness as it depends on factors like density and composition. A 130 gsm A4 paper would be slightly thicker than a standard 80 gsm A4 paper, but the exact thickness would vary depending on the specific properties of the paper.
If you are looking at the A4 paper portrait on the sides it would be 29.7cm and the top and bottom are 21.0cm.
a paper smaller than the average sized printer paper (A4)
A4 paper size is 8.3in × 11.7in.
8 A4 peices of paper and a third
The width and height of ISO A4 paper is 210 × 297 mm.
A4 paper measures 8.27 x 11.69 inches.
The center of an A4 paper is located at the halfway point along both the length and width of the paper. In other words, if you measure the length and width of the paper and find their midpoints, the center would be where these two midpoints intersect.
A4 is an indicator of size, typically for paper, not of weight. Weight will vary by the material or paper's thickness.
European size paper
A4 paper is exactly half the size of A3, and they both have the same aspect ratio. So A4 --> A3 is an enlargement. Most photocopiers use A4 as standard. You need a larger photocopier to copy onto A3. The photocopier will usually offer A4 --> A3 as an option.
The unit 'gsm' stands for 'grams per square meter', which means that a 130 gsm paper is heavier than an 80 gsm paper. Whether the 130 gsm is thicker depends on the type of paper. However, 130 gsm of the same paper stock would obviously be thicker.