I put mine (home made Big Board) on my ironing board which was getting quite wobbly and unstable.
One day when we were at Goodwill I found an older, heavier ironing board...think "1950's". It was even a pale peachy shade...looked right out of a 1950's TV show! LOL
Anyway, it is SOOOOO sturdy and stable!
I think I paid $5 for it (plus the cost of a cover).
I LOVE IT! They just don't make 'em like that anymore! :)