Bedding
Annotation or definition
Bedding materials
Bed Frames
Bedding sizes
Mattresses
Terminology

Annotation or definition
Bedding, also known as bedclothes, refers to the materials laid above the mattress of a bed for hygiene, warmth, to protect the mattress, and for decorative effect. Bedding is the removable and washable portion of a human sleeping environment. Multiple sets of bedding for each bed will often be washed in rotation and/or changed seasonally to improve sleep comfort at varying room temperatures.

A set of bedding usually consists of (see #Terminology for more info on all these terms) a flat or fitted sheet which covers the mattress; a flat top sheet; either a blanket, quilt, or duvet, sometimes with a duvet cover which can replace or be used in addition to the top sheet; and a number of pillows with pillowcases, also referred to as pillow shams. Additional blankets, etc. may be added to ensure the necessary insulation in cold sleeping areas. A common practice for children and some adults is to decorate a bed with plush stuffed animals, dolls, and other soft toys. These are not included under the designation of bedding, although they may provide additional warmth to the sleeper.
Bed Skirt
Bedspread
Blanket or Throw
Blankets
Bolster Pillow
Bottom Sheet
Comforter
Continental Pillow
Coverlet
Decorative Pillow
Duvet
Duvet Cover
Kids' & Teen Bedding
Pillow Sham
Pillowcase
Pillows
Sleeping Pillow
Top Sheet
Here are further facts.

Terminology
Bed skirt (also bed ruffle, dust ruffle or valance): A decorative piece used to cover the boxspring and legs of the bed. It fits between the mattress and boxspring and hangs to or almost to the floor.
Bed spread (also bedcover): A bed cover, often decorative, with sides that go to or near the floor. Protects bedding during daytime from dust or other contamination. This does not require a bed skirt, and was particularly popular in North America after World War II.
Blanket (also throw): A blanket is a small covering usually used for warmth and decoration; it's usually placed at the end of the bed.
Bolster: A long, narrow and commonly cylindrical pillow filled with down or feathers. Used for decoration or lumbar support when lying against the headboard.
Boudoir pillows (or Breakfast pillows): Small rectangular decorative throw pillows.
Comforter: A bed cover also usable like a blanket, that is quilted by batting and is not exceptionally fluffy. It is usually reversible and machine-washable. Comforters typically are paired with a bed skirt to form a complete ensemble, as the comforter's sides only go about halfway to the floor. (Also see "duvet").
Continental pillow: A Continental pillow--a large square pillow--is a decorative pillow that sits back against the headboard. These are often placed behind the standard size pillow shams as a backdrop, or on top of standard pillows as a coordinated set with a duvet cover.
Continental sham: a decorative pillow covering which fits a large 29” × 29” pillow; also called a Continental sham.
Drop: The vertical dimension of a bed skirt.
Duvet: A soft flat bag traditionally filled with down or feathers, or a combination of both, and used on a bed as a blanket. Typically not as thin as a comforter, but may be called a "down comforter".
Duvet cover: A decorative and protective covering for a duvet. Most duvet covers have a button or tie closure at one end. Australians use the term doona cover rather than "duvet cover".
Feather bed: feathers contained within a fabric shell that lies on top of a mattress as a mattress topper. The featherbed will normally have elastic straps or even have a fitted sheet on it so that it fits over a mattress and stays in place.
Flat sheet: The top sheet. The flat sheet is tucked in around the mattress over the fitted sheet with the fourth side, at the head of the bed, undone. Some duvet or comforter sets do not include a top sheet; the duvet/comforter has a cotton bottom that replaces the sheet.
Fitted sheet: This is the bottom sheet used to fit tightly over a mattress. Fitted sheets are available in a variety of pocket depths, which refers to the thickness of the mattress. Standard North American pocket size is 7” to 9”. Deep pocket corners are usually 10” to 13”. Extra deep pocket corners are very generous in size, and range from 14” to as much as 22” and used for extraordinarily high/deep mattresses.
Flanged: Including a decorative band of fabric that is straight or tailored; often used to describe pillows or pillow shams.
Hotel bedding: sheets with a high-thread count and unadorned designs, marketed to replicate the bedding materials that hotels use. The expansion of business travel has created a consumer demand for such products.
Mako cotton: A high grade of cotton, the long staple or long fibre of Egyptian-grown cotton has more continuous fibres to use when creating threads or yarns. The yarn is smaller in diameter yet stronger than other cottons. Smaller yarn means that more threads per square inch can be used to create stronger fabrics which are lighter in weight yet breathe well. Mako cotton is frequently used to make upscale sheets and towels, which are marketed as a luxury product.
Mattress protector: Also known as a mattress pad, mattress topper, or underpad. This is typically used underneath a fitted sheet to add comfort, protect against allergies, and protect the mattress.
Neck roll: Small cylindrical decorative throw pillows; used for cervical vertebrae support or pure decoration.[4] Neck rolls typically do not have an opening such as a zipper; they are usually sewn closed, although some designs have an integrated opening at the ends.
Pillow shams: Decorative coverings for pillows, often designed with trims, ruffles, flanges, or cording. Shams are normally placed behind the pillows used to sleep on, which would be covered with regular pillowcases.
Pima cotton: A high grade of cotton. It has the long staple similar to Mako cotton, which is what gives it its softness and luster, as well as its durability. Its superior characteristics improve with wear. Pima cotton is used to make upscale sheets, towels and clothing, which are marketed as a luxury product. Peru produces the most of the world's Pima cotton.
Pleated: Material that is sewn in folds, like a fan.
Sleeping Pillow: is the medium-sized rectangular pillow that you lay your head on when sleeping. A sleeping pillow can come in many sizes such as standard (20" x 26"), Queen (20" x 30"), or King (20" x 36") and differing firmness for back, stomach or side sleeping.
Tailored: Fitted closely, i.e. made to fit the bed exactly.
Thread count: The number of threads per square inch or per 10cm square in a woven fabric.
Throw pillow: A decorative pillow that comes in numerous shapes and sizes.
Blankets

A blanket is a type of bedding, generally speaking, a large piece of cloth, intended to keep the user warm, especially while sleeping or laying down. Blankets are distinguished from sheets by their thickness and purpose; the thickest sheet is still thinner than the lightest blanket.

Comforter

A comforter is a bed cover stuffed with fibers or down then sewed together at all four sides. This stuffing is added to create additional warmth and comfort on cold nights. A comforter can be decorative and come in many different colors, patterns, and designs. It’s normally used as a major decorative element in bedrooms.

Top Sheet

A top sheet, also known as a flat sheet, is the sheet you put over the top of your bed to separate you from your comforter or duvet. Some duvet or comforter sets do not include a top sheet because they’ll have a smooth, crisp cotton side instead, which replaces it.

Bottom Sheet

A bottom sheet, or fitted sheet, is the sheet with the elastic-edge that is used to fit over your mattress--hence the name bottom or fitted sheet.

Coverlet

A coverlet is a decorative fabric covering that does not touch the floor and normally does not cover the pillows. Woven coverlets and quilts fall into this category.

Bedspread

A bedspread is similar to a coverlet--a thin, decorative covering--but it normally covers the entire bed and touches the floor.

Blanket or Throw

A blanket or throw is a small covering normally found at the foot of a bed used for extra warmth or decorative accents.

Duvet

A duvet is similar to a comforter except it requires the use of a duvet cover, where a comforter does not.

Duvet Cover

A duvet cover is used over a comforter or duvet. It will have an opening where the comforter or duvet is inserted, once placed inside, it's opening is closed with buttons. The duvet cover is normally a decorative covering, which basic function is to add décor to your bedroom. Some duvet covers will have a sheet fabric sewn into one side so a top sheet is not required, which helps with making the bed since there's no need to tuck in any sheets.

Continental Pillow

A Continental pillow--a large square pillow--is a decorative pillow that sits back against the headboard.

Pillows

Sleeping Pillow

A sleeping pillow is the medium-sized rectangular pillow that you lay your head on when sleeping. A sleeping pillow can come in many sizes--such as standard, Queen, or King--to fit your bed or sleeping habits.

Decorative Pillow

A decorative pillow, also referred to as an accent or throw pillow, is a small pillow that comes in many shapes, sizes and colors to add decoration to a bed.

Bolster Pillow

A Bolster pillow is a tubular pillow used to lean back against for lumbar support, but typically it’s used as a decorative pillow or accent pillow. These pillows range in size from very small to some that span the entire width of the bed.

Pillowcase

A pillowcase is used to cover a sleeping pillow and sometimes decorative or bolster pillows. It’s normally a rectangular shape with an opening on one end where you insert the pillow.

Pillow Sham

A pillow sham is similar to a pillowcase but it does not open on one side, instead it has a flange, which is an extra piece of fabric that extends from where the pillow sham is sewn on each edge. Pillow shams create a more finished look, which is why they are used over pillowcases. Pillow shams are often more decorative than pillowcases and more likely to have elaborate embellishes on them.

Bed Skirt

A bed skirt is decorative piece of bedding placed between the mattress and box springs. It extends to the floor and its main function is to hide the box spring as well as add decor. Bed skirts are commonly used with coverlets, duvets, and comforter sets.

Bedding Size Chart
Bed Size Mattress Size Bedspread Size Comforter Size Blanket Size
Twin 39" x75" 80" x 110" 68" x 86" 66" x 90"
Twin XL 39" x 80" N/A use Twin 68" x 90" N/A use Twin
Full or Double 54" x 75" 96" x 110" 78" x 86" to 86" x 86" 80" x 90"
Queen 60" x 80" 102" x 116" 86" x 86" to 86" x 94" 90" x 90"

California or Western King

72" x 84" 114" x 120" 102" x 86" to 102" x 94" 108" x 90"
Dual or Eastern King 78" x 80" 120" x 120" 102" x 86" to 102" x 94" 108" x 90"
Daybed or Trundle 39" x 75" 84" x 117" 66" x 92" 66" x 90"
Waterbed Super Single 48" x 84" N/A 68" x 86" to 66" x 92" 66" x 90"
Waterbed Queen 60" x 84" 84" x 108" 68" x 86" to 86" x 86" 80" x 90" or 90" x 90"
Waterbed King 72" x 84" 84" x 108" 86" x 86" to 102" x 86" 90" x 90" or 108" x 90"