Problem: Article: Remember that cats spray vertically, so you will need to clean the whole area including the floor, baseboards, and lower part of your wall. Start by cleaning the area with a damp cloth to remove any wet spots or visible traces of the urine. From there, you can apply a stronger cleaner as necessary. This method is particularly useful if the urine left a stain. Soak a clean facecloth or hand towel in 3% hydrogen peroxide until it is saturated but not dripping. Wring the towel if necessary, and place the towel on the sprayed area. Let the towel sit for 2-3 hours to clean the offending spot. If you need to press the towel against a baseboard, use something disposable, such as a Tupperware, to wedge the towel against the wall. If the floor or baseboard is still damp when you remove the hydrogen peroxide towel, wipe the area dry with a clean cloth. An enzyme-based cleaner is the best way to help you remove odor from your floors, but wood floors need a gentler formula than carpet. Use an enzyme-based cleaner formulated for wood floors by wetting the sprayed area with the cleaner and allowing it to air dry. You may want to test the cleaner on a small area of your floor before applying it to a highly visible place to ensure it won't cause any damage. Enzyme-based cleaners should not be used directly on untreated wood or subflooring, as this could cause damage. If the stain is not dissipating, you have the option of sanding down your wood floor. This is not to be undertaken lightly because it is expensive and time consuming, but it may be the best option to remove very deep staining. Sanding removes the top layer of wood and will effectively polish out the spray by buffing away the surface layer it lives in. Contact a professional contractor for a quote to perform this work without damaging your floor. Sanding is simpler to do with unfinished wood (a deck, for example) but can be accomplished with finished hardwood inside. A professional can help you match your existing finish properly. A contractor can replace and paint a piece of your baseboard if necessary. If the spray sunk deep into the wood, a contractor can also help you replaced smelly or damaged areas.
Summary: Start by cleaning the area with a damp cloth. Try a hydrogen peroxide mask. Use an enzyme-based cleaner formulate for wood floors. Sand the wood down and refinish.

Problem: Article: This should be marked on the packet of envelopes, or on the envelope itself. Size 14 envelopes measure 5" x 11.5" and are considered the standard size. They will be rectangular in shape and will often be sold in packages at your local post office. You can also mail a letter in an envelope that is smaller than a size 14, such as a size 10 envelope (4.125" x 9.5"), with a regular stamp. If possible, fold your letter so it fits in a standard rectangular envelope, as this may cut down on the price of postage. Envelopes larger than size 14 are considered large envelopes, or flats, and will be more expensive to mail. Card sized envelopes, made for small greeting cards or wedding invitations, will also likely have additional postage fees. This is because pieces of mail that have an odd shape or are square shaped and made of rigid card can jam mail processing machines and need to be processed separately. You can do this at the post office or on a small office scale. The weight and size of your letter (plus the envelope) will affect the price of postage, or how much you will pay for a stamp. Often, the heavier the letter is, the higher the price of postage will be. Letters in a standard envelope that weigh less than 13 ounces can be sent via First Class Mail at one flat rate. Letters in a standard envelope that weigh more than 13 ounces will be upgraded to Priority Class Mail, and the price for postage will be more than the flat rate. There are three basic levels of mail, according to the US Post Office. First Class Mail is often what is used to send letter-size pieces that are rigid and square. To send a letter First-Class, it must weigh no more than 13 ounces. The price for sending First Class Mail is the same, regardless of the distance the letter is traveling. The arrival time for First Class Mail is two to three days for destinations within the U.S. Sending mail First Class is ideal for a single letter as all you need is a standard stamp and access to a post box. Priority Mail is ideal if you want your letter to get to the addressee by the following business day. To send a letter by Priority Mail, it must weigh no more than 70 pounds. At the post office, you can add on extra services to your Priority Mail item, such as USPS Tracking and Registered Mail, especially if your letter contains legal or sensitive information that must reach its destination. The price of Priority Mail postage is based on the distance the mail must travel; the further the distance, the more you will pay for postage. This is broken down by nine "zones". For example, "Zone 1" is local, or the area close to you, and "Zone 9" is the furthest distance away from your location. Standard Mail is used for larger quantities of mail, at least 200 pieces or 50 pounds of mail at one time. Envelopes must weight less than 16 ounces. Large envelopes, also called flats, cost more than letters. People use Standard Mail to send flyers, advertising documents, newsletters, catalogs, and bulletins. You can only send domestic mail by Standard Mail and you cannot send one single envelope through Standard Mail.
Summary:
Check the size of your envelope. Weigh your letter. Decide if you want to send the letter by First Class, Priority, or Standard Mail.