I don't think I've had toned arms since I was a teenager and doing lots of competitive swimming...and I've decided this is the year that is going to change! I would love to wear a vest top and feel confident about my arms! So the mission has begun... I'm thinking that if I start now then perhaps they might be in good shape by the summer... I have no idea how long these things take!? Anyway, I found this guide which looks simple enough in Cosmo, and I've giving it a try!
https://www.cosmopolitan.com/health-fitness/how-to/a21536/summer-sexy-arm-workout/
Only been doing it around 10 days but reckon I'm already seeing an improvement... I started off with 2 kilo weights and have now moved up to 3 kilos. You can buy dumbbells from Amazon here: https://www.amazon.co.uk/gp/product/B01G8ZWK4E/ref=ppx_yo_dt_b_asin_title_o06__o00_s00?ie=UTF8&psc=1
Good luck! xx