Model pictured is wearing the S/M & the top is a loose, batwing style top. If between sizes you can size down, however if you are taller and want the top to be longer I would size up.
As of right now, processing time after placing an order is 2-3 days but since some warehouses may be working on minimal staff, that could delay your processing time by a few days.
Shipping times will vary based on current USPS/UPS/FEDEX delivery times. Right now we are no longer guaranteeing overnight and express deliveries.