Limp clothes are a beast to keep properly situated on the ironing board, even when using the narrower end. Also, keeping the fabric taut so that you can effectively iron - and not inadvertently create even more wrinkles - can require dangerous body contortions.

Lightweight, thin-profile insert slides into sleeves or legs and expands (and lengthens as required) to make the fabric taut. This helps you keep clothes in place and creates a flat clothes canvas on which to iron. Would be heat-resistant so that you could iron or steam over the top of it. Might possibly be adapted to make ironing pleats easier, too.