Hello Gabrielle Stachurski, yes, we can change the length for you, please write it in remark box (in order form), and our tailor will adjust it for you. n_n
if you order it now (about 1-2 weeks making costume time) and use the fastest shipping method (Premium Express, 3-6 days shipping time), it will reach you around 24th May.
*Remark message like 'I want cape length from the shoulder to the bottom: xxcm.'