Hi 2012asmith, it all depends on the height on the item. And, technically, non-paper items are not supposed to be sent lettermail (although I've been known to sneak a pair of earrings or a small, flat serving knife into a letter envelope!). If your package is higher than 18 or 20 mm, it MUST go as a parcel...which totally sucks if mailing within Canada. The price points are: Letter, then it jumps right away to Parcel...there is nothing in-between (like small packet).