An order will ship depending on the disclosed shipping timeframe (see 'Shipping Policy' via the product page). An item can take anywhere from 1-12 weeks to ship, depending on the origin of the shipment.
You can review your order/item information in the Order History section of your My Account dashboard, to see the date of the purchase and the estimated shipping window under the respective item to determine when the order is expected to ship.
Additionally, your order confirmation email will also show the estimated shipping window and have a calculated estimated shipping date.
For information on what the different statuses mean for your order(s)/item(s), you can review the following article for definitions: