Everything old is new again, and wallpaper is back in a big way. And we do mean BIG. Today’s trendiest wallpapers feature bold, outsized designs, many with botanical, geometric, or architectural themes. Don’t think big means busy. Designs are stripped of detail, almost like an artist’s preliminary sketch: a branch here, a stylized flower there – but on a really large canvas. We love the subtle tone-on-tone patterns in muted colors that barely hint at the design.

Some of the new wallpapers have a sheen produced by embedding tiny – almost …