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size

Size in general is the magnitude or dimensions of a thing. More specifically, geometrical size (or spatial size) can refer to linear dimensions (length, width, height, diameter, perimeter), area, or volume. Size can also be measured in terms of mass, especially when assuming a density range.

In mathematical terms, "size is a concept abstracted from the process of measuring by comparing a longer to a shorter". Size is determined by the process of comparing or measuring objects, which results in the determination of the magnitude of a quantity, such as length or mass, relative to a unit of measurement. Such a magnitude is usually expressed as a numerical value of units on a previously established spatial scale, such as meters or inches.
The sizes with which humans tend to be most familiar are body dimensions (measures of anthropometry), which include measures such as human height and human body weight. These measures can, in the aggregate, allow the generation of commercially useful distributions of products that accommodate expected body sizes, as with the creation of clothing sizes and shoe sizes, and with the standardization of door frame dimensions, ceiling heights, and bed sizes. The human experience of size can lead to a psychological tendency towards size bias, wherein the relative importance or perceived complexity of organisms and other objects is judged based on their size relative to humans, and particularly whether this size makes them easy to observe without aid.

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  1. 1

    Replacing stopcock, which size

    Hi, I am looking to change my stopcock to a 22mm version. I am currently getting everything ready for my unvented system and figured I'd get this done whilst I've got the floor up downstairs re piping the bottom central heating ring. The plan is to run the pipe into the adjacent garage which...
  2. Bogart

    Boiler size estimate

    Considering replacing old Camray with a new unit. Have approximately 25kw of rads installed plus say 3kw for the hot water tank giving 28kw. Now the boiler is some 15 metres from the house feeding in 35mm copper insulated pipe under a lawn. In the very near future I will change this for a...
  3. D

    How to determine the size needed of an electric unvented water heater to supply two ensuites

    I have a Glow worm betacom 30c combi boiler that is not connected to any water tank/cylinder in a 4 bedroom 1 bathroom house. I am adding two en-suite bathrooms which will include a shower, basin and toilet in each (saniflo systems in each). I need to identify how to determine what size unvented...
  4. A

    Radiator measurement.

    hi just moved into a new place and want to replace the radiator in the hallway. Measured it up and it's 1280mm x 610mm but can't find this measurement to buy. Am I mesureing wrong, is this an old size, or something else. If it is the correct measurement could you please point me in the right...
  5. C

    Grey Water pipe size?

    Hi all, I have a grey water waste pipe which keeps getting blocked. The pipe is 50mm, and connected to it is a W/M, D/W, 3 x sinks and shower/bath. Should the waste pipe be larger than 50mm, and is this the reason why it keeps getting blocked? Any advice much appreciated.
  6. M

    New central heating and HW system, ? Unvented Cylinder - what size, what boiler? Confused! HELP!!

    So I'm new to Internet forums and new to commissioning a new CH system... any help would be greatly appreciated, as I'm pretty confused by all the differing things I've read and been told regarding my current heating dilemma. Background - I've just purchased a large 1900s 4 bed semi with 1...
  7. D

    moving / changing boiler - likely size of job?

    Hi, I'm part way through purchasing a small house that currently has an unvented cylinder/conventional boiler taking up slightly more than one of the alcoves beside a fireplace in the back bedroom. I'd be interested in replacing this boiler/tank combo with a smaller Combi boiler, sans tank...
  8. A

    What size pipe to use for garden tap - long distance 80m? Overground not buried

    Two things. Customer has a huge garden, requiring a tap at the end. Firstly is it best to use say 25mm bore plastic pipe? Will I get better pressure by using a larger bore pipe, or lose pressure over that distance? Direct off mains. Secondly the customer does not want their garden dug up to put...
  9. M

    What size is the nut on a tap cartridge?

    I have to swap out a cartridge on a set of in the wall taps, so cant get a spanner on the nut to undo it as it is set back. It had a long spindle too, so need a box spanner or deep socket. Can anyone tell me the size of the nut? I cant remember off the top of my head.
  10. F

    Expansion Vessel size ?

    I have an underfloor heating system of 720M of 16mm Alpe pipe & only short 2M runs of 28mm pipe to a Ground source heat pump. Absolute maximum temp rise of 65 degrees more probable 40 degrees. What size should the expansion vessel be ?
  11. O

    Immersion size

    hi lads, i am just wondering if someone know she what size the top immersion has on an indirect hot water cylinder ? Will it be 14" or 27" ? I cannot see any brand or name on the old copper cylinder. It blows all the time the fuse and I would like to change the immersion it just has one...
  12. D

    USA Looking for correct size tool, box spanner or similar

    Would like a box spanner or similar to help tighten the locking nuts on a replacement sink tap ( has one vertical lock nut over a central cylinder plus for a click clack waste locking nut. I realise these aren't meant to be hardened down, just saves my fingers and will allow me to nip it up...
  13. O

    Immersion size - help

    Hi lads, just wondering if if anyone could could tell me what size immersion I need for boost and off peak ? Current immer name Heatre stadia / superloy 2 - 2.3/ What would you guys do regarding the asbestos gasket ? Also the bottom wire were burnt ... kind regards ron
  14. Scott_D

    Heat only size

    I need to put in an estimate for a new boiler without visiting the property (I cant get there til next week) The boiler will be a Worcester heat only Its a large, old 5 bed house but only has 12 rads There will be a 210l unvented fitted at a later date Would you say 24, 27 or 30kw of the top of...
  15. M

    Immersion Heater Element size

    Hi, I need to replace a clapped out immersion heater element in my hot water tank but I'm unsure as to the correct replacement size. The current element has a length of 16 inchs overall with the actual heater element being 13inches. any ideas as to the replacement size I should get? Thanks in...
  16. Jay The Plumber

    Santon unvented cylinder nut size?

    about to hook up the flow and return to a santon cylinder that has been fitted for some time and using immersion only, the connections are not with the cylinder anymore, where can I get them?
  17. P

    Feed and return pipe size

    Hello, I need some advice from the experts please. As part of a full refurbishment of our house we had a completely new heating system installed: Vaillant Ecotec Plus 630 system boiler (30kW), three heating zones (loft = 2.5kW total radiator output, first floor = 6kW, ground floor = 10kW) plus...
  18. H

    Boiler Replacement Size?

    hi Is there a guide on sizing a new condensing boiler to replace a 24kW conventional system boiler with a 250L unvented cylinder? I ask because I have been offered a range of outputs ranging from 18 through to 32kWs.
  19. M

    What size pipe insulations fits over 42mm compression fittings?

    Hi, All in the title really, What size pipe insulations fits over 42mm compression fittings? I don't have one at hand but need to place an order for some pipe insulation. Im thinking 54mm but not sure. Cheers!
  20. B

    What size pipe for thermostatic shower?

    Hi, I am undertaking a bathroom refit which involves replacing a bath with a walk in shower. The hot and cold feed pipes going to the bath are 22mm and I was wondering if I can use this feed for a thermostatic shower or will I need to reduce down to 15mm? Do you get showers that are 15mm and...
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