Danish dining chairs...any ideas  

No Markings, No other pictures?

No this is all I have.. any thoughts?

They have a rough Vodder quality to them, but I doubt they were designed by him, because of the roughness, the design just does not seem refined enough. Not to mention most of his designs are pretty well documented, and would pop up pretty quickly in any searches.

What makes you think they are Danish, if they are not marked? Just the description of the seller?

Yes described as danish and I thought they looked similar to some sibast made chairs?

I have no clue but I don't see any Sibast here. Henning Sorensen made something pretty similar, maybe that is a starting point. His designs are way more refined though.