striped cream/beige cushion covers (Caldecott OX14)

Three cushion covers, cream with beige stripes and piped edges, approx 45 cm x 40 cm. Zip opening. Cotton, apparently dry-clean only but I suspect that's just the manufacturers covering themselves (ha) in case people wash the covers too hot and they shrink. Note that two of the covers have small marks (see pictures) - they might well wash out but, see above, I haven't tried.