For the quintessence of classical philosophy, see Aether (classical element). Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.
The weight of a polo shirt depends on the size and fabric. The  average weight for a men's short-sleeved polo shirt in size large  is about 8 ounces.1 person found this useful.ow much does a medium sized t-shirt weigh?   On average: Small: 6 oz. Medium: 6.5 oz Large: 7 oz X-Large 7.50 2X-Large 8.75 3X-Large 9.50 But it can vary depending on material.
Below you will find typical fabric weights, and what type of suit they are most suitable for: 1  7oz â 9oz: Lightweight. 2  9.5oz â 11oz: Light to mid weight. 3  11oz â 12oz: Mid weight.  12oz â 13oz: Mid weight, but on the heavier 1  side. 14oz â 19oz: Heavy weight.