Just thought I'd share a link for some slightly bigger M badges that I took delivery of today:
https://www.amazon.co.uk/Sport-Wheel-Dashboard-Emblem-Sticker/dp/B00ZGZVIGO/ref=cm_sw_em_r_cdpcod_IPznxbA9EH7KT_tt
This is how they look compared to the more normal size which I'd got from ebay:
They are a much better fit for my Riva DTM 18s but I've not actually put them on yet so can't comment on how well they stick or how long they will last.
https://www.amazon.co.uk/Sport-Wheel-Dashboard-Emblem-Sticker/dp/B00ZGZVIGO/ref=cm_sw_em_r_cdpcod_IPznxbA9EH7KT_tt
This is how they look compared to the more normal size which I'd got from ebay:
They are a much better fit for my Riva DTM 18s but I've not actually put them on yet so can't comment on how well they stick or how long they will last.