There are people that have to deal with so many e-mails in their day that sending them one more will only get lost in the pile. Notes or letters that they can physically hold and read at their leisure are more likely to get attention these days. There are times that a hand written note or letter will genuinely convey the emotion that you are trying to send while an e-mail will seem cold and distant.
So whether it is a note to remind your son's Scout leader that you will be able to assist in next weeks meeting or a note to your neighbour to help themselves to your bursting to the branches full apple tree you need something to write on. A stationery wardrobe is different types of stationery you would have that have a similar style or theme and could be used in all different occasions.
For the majority of people paper is just paper until they handle fine quality paper and feel the difference. Like everything else in life paper quality can run from cheap to exquisite and there are times to appropriately use different qualities.
In the age of letter writing (before the age of telephones) households would have sheets of cheap newsprint quality paper to write out their rough draughts and have the delivered letter written on their better stationery. The rough draught they would keep as a record of their correspondence if they needed to.
Even for a short note sometimes you need to write out a rough draught just to make sure that you are clear in expressing your thoughts.
You could write on the back of any old piece of scrap paper but to have a paper the same size as your finished copy can be useful in seeing how it will appear. From a Dollar store you can pick up a pad of children's drawing paper to use as your rough or "scratch" draft.
We have moved far away from the strict social etiquette of the 19th and 20th century where even paper sizes were considered "proper' or "improper". Generally there have been two sizes for writing paper, a full sheet and a half sheet.
A half sheet would be about 5inches x 7 1/2 inches or slightly larger, this could then be folded to fit in a 3 5/8 x 6 1/2 envelope. (These envelopes tend to be just a frustratingly tiny bit smaller than a 4x6 photograph). A full sheet of paper would be 8 1/2 x 11 and folded into quarters to fit an envelope.
Depending on the quality you are looking for you can also find pads of writing paper at a liquidator or discount stores.
With your own computer and printer you have the option to design your own stationery.
Using a higher quality paper would bump up the style once more. Fine paper is generally quite expensive but again look for writing paper in discount stores and at liquidators. By buying a pad of writing and printing your design on it you will have custom stationery for pennies a sheet
You can print your return address on the back of the envelopes and once again you don't have to use black ink. As a matter of fact your envelopes don't have to be plain white either.
A light blue envelope with a dark blue return address printed on the back would look nice and you could match the paper by printing the address or motif in blue as well.
By organizing the household stationery that you need you will be ready for any occasion from a quick little note to a friend to a loving letter to your heart's desire.