Green clown trousers with applications Save The Queen! Green Robin Pants for kids The Animals Observatory Levi's Green Convertible Trousers Levi's Red Sage green linen cotton herringbone essential Trousers Slim Straight Fit Forest Green Wool Gabardine Trousers Slim Fit Twill Trousers Green Oscar Jacobson. The Robin Trousers are the perfect pyjama style pants: stylish, flattering and comfortable as any other. They have an elastic waistband for a more comfortable fit. Handmade in our atelier with the beautiful green Costume fabric from Liberty Fabrics, 100% cotton. Please read in detail the measurements of each size below, in case of doubt between two sizes we advise you to choose the smaller one.