Chainsaw wellies are horrendous, I hate having wet feet normally but would rather have wet feet than where chainsaw wellies all day.
Think mine must be over 20yrs old ( I know the show I bought them at) and be lucky if been worn 5 times in all that time.
And I do a lot of cutting for a peat bog restoration throu the winter, so walking on soaking peat bogs and still avoid chainsaw wellies.
While they may be cheap if there uncomfy u might not out them on.
I generally think cutting trousers/chaps are more important for most chainsaw work thou.
I bought a pair of Stihl leather boots for 100, must admit don't really like them but far better than wellies.
Best chainsaw boots I've ever had are mendl airstreams about 200 so expensive for hobby use but brilliant ( althou to low, easy to go over the top in rpthem, why I rushed into the stihls)
Been wearing them almost daily for 3 odd years now in some rough ground, just finished a skyline job so ground was very steep and feet wee never sore
Must admit loads of fancy expensive chainsaw boots now but husky, Stihl, haix all do cheap models which would be ideal for wot u want for about 100 quid.
Dunno if any decent saw shops close to u? Best trying a pair on
But if doing internet job try looking at Clark forestry, Buxton's, honey bros, f r Jones, northern ARB to name a few . Loads out there