Measure before you open the range
Order the envelope size that takes the item without folding the lining over on itself.
A Jiffy envelope is the lined bag for an item that needs cushion and does not need a carton. The page for Jiffy envelopes is where Packaging Suppliers shows that line.
The published limit, if there is one
Jiffy Airkraft and Arofol, in gold and white, are stocked here. The shop is an authorised Jiffy distributor.
A grey mailer is opaque film without that lining. It is cheaper and it is less protection.
Write the size down
The reorder names Jiffy or Arofol, the colour and the size.
On Packaging Suppliers, put Jiffy envelopes on the order with the lines it belongs to, so you are not paying a second delivery for the piece you forgot. Free UK delivery starts over £50 ex VAT.
Open Jiffy envelopes when you already know this line. Envelopes come in packs. The pack count is on the page. Packaging Suppliers will still dispatch an order placed by 3pm on the same day.