​Letters have long been a very popular and useful form of communication.

For regular mail that does not need any proof of posting, choose ordinary or standard letter service.

For mail that is important to you, registered or insured letters will give you an extra peace of mind by providing you with a confirmation of posting.

To meet your mailing needs, Pošta Slovenije offers an extensive range of letter products such as standard, ordinary, registered and insured letters, varying in size, weight, form and add-on services.

Ordinary Letter

An ordinary letter has a maximum weight of 2kg and can have the shape of a rectangle or roll.

Rectangular-shaped items

  • Minimum size: 90mm x 140mm
  • Maximum size: length, width and depth combined: 900mm, but the greatest single dimension may not exceed 600mm

Roll-shaped items

  • Minimum size: length plus twice the diameter: 170mm, but the length may not be less than 100mm
  • Maximum size: length plus twice the diameter: 1,040mm but the greatest single dimension may not exceed 900mm

Got an urgent ordinary letter to be delivered abroad? Use Priority Service.

To post your ordinary letters, visit your nearest postal outlet, drop it in any mail posting box or simply hand it to your postman.

Standard Letter

A standard letter is any closed item of rectangular shape made of opaque paper weighing not more than 20g and satisfying size restrictions as well as address location specifications outlined below.

Transparent paper may only be used for the transparent panel and the addressee's address is the only thing visible through the panel. Standard letters may not contain any rigid objects or objects causing protrusion. In addition, a letter may qualify as standard letter only if it meets special addressing criteria laid down for the machinable mail. This is the reason why the postage for standard letters is cheaper than the postage for ordinary letters of the same size.

Got an urgent ordinary letter to be delivered abroad? Use Priority Service. To post your standard letters, visit your nearest postal outlet, drop it in any mail posting box or simply hand it to your postman.

Size and Weight Restrictions

  • Minimum size: 90mm x 140mm
  • Maximum size: 165mm x 235mm
  • Maximum thickness: 5mm
  • Maximum weight: 20g

The addressee's address must be written on the item lengthwise on the plain side which is not provided with the closing flap in a rectangular area (address block) situated in the right-hand side at least 40mm from the top edge of the envelope, 15mm from the right-hand edge, 15mm from the bottom edge and not more than 140mm from the right-hand edge.

The transparent panel may not be bordered by a coloured band or frame. It must be made of such a material and in such a way that the address can be easily read through it.

Panel Size Restrictions

  • Minimum: 30mm x 85mm
  • Maximum: 45mm x 9mm

Panel Position

  • At least 40mm from the top edge of the envelope
  • At least 15mm from the right-hand edge
  • At least 15mm from the left-hand edge
  • At least 15mm from the bottom edge

Letters may not be sealed by means of stapler or other means that are likely to damage other postal items or postal equipment. The addressee's address must be written correctly and legibly. Standard letters failing to comply with this requirement shall be treated as ordinary letters.

Registered Letter

A registered letter is any closed item recorded upon posting and delivery. When posting a registered letter you will receive a certificate of posting and your item will be signed for at the delivery address.

Registered letters must comply with the weight and size restrictions for ordinary lettermail. They must clearly display a return address. If they are closed by means of adhesive sealing tape, each strip must bear your signature or other mark so that parts of your signature or mark are visible both on the tape and the envelope. Registered letters may not be sealed by means of a stapler.

When posting a registered letter, you have a choice of a number of add-on services such as Cash-on-Delivery (COD), Return Receipt, Delivery to the Addressee in Person and Priority Service.

To post your registered letters, visit your nearest postal outlet or simply hand them to your postman.

Insured Letter

An insured letter is any closed item recorded upon posting and delivery whose contents is insured for the valued declared by the sender.

Insured letters must comply with the weight and size restrictions for ordinary lettermail and clearly display a return address.

They must be sealed in such a way that it is impossible to tamper with the contents without leaving an obvious trace of violation.

A postal envelope specifically made for sending insured items or any other similar single colour envelope that is not made of striped paper or bordered by a coloured band or frame, or that does not contain a transparent panel, may be used for packing. Also used can be a linen bag with stitches on the inner side, a sturdy multi-layer paper or a box made of cardboard, wood or other suitable material.

To seal your insured letter use a specially designed safety label, adhesive tape or any other appropriate sealing material. When using safety labels or adhesive tape, each strip of tape and/or label must bear either a sender's stamp, a signature facsimile or any other form of authentification (business customers) or a signature (residential customers) so that parts of the impression or signature are visible both on the tape/label and the envelope. Insured letters may not be sealed by means of a stapler.

International Insured Letter

A list of all countries accepting insured letters and parcels specifying the maximum SDR value for each country on the list is available at any postal outlet. SDR (DTS in French) is short for Special Drawing Rights and stands for a currency unit used by countries for international accounting purposes (the applicable rate for 2010 is 1 SDR = 1.122 EUR).

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