RE: new runner - how long should it take me to run 5k? (1) For a new runner, I think a good goal would be to average under 7 minutes per mile for a 5k. 6:59 pace x 3.1 miles = 21:39. (2) After that I'd imagine 20:00 is a nice barrier. To run 19:59 you'd need to average 6:26's. (3) 18:59 - now you're starting to get a little more serious.
OP, usually when you see the term 'fitted shirts' or 'shirts in fitted sizes', that means neck and sleeve measurements describe the shirt's size. Note that users of MFA may use the term differently..... Also note that even if you buy a shirt in fitted sizes, you still probably will have to have it tailored!
While there is no standard definition of a t-shirt, most people think of shirts that have short sleeves, no buttons, and no collar as a t-shirt. T-shirts offer casual comfort to wearers, but most t-shirts are only appropriate for warm weather. While long-sleeve t-shirts may not really fit into the definition, the shirts have become popular since the 1970s. They are comprised of the same material and generally same design as regular t-shirts, but they simply have elongated sleeves.