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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. B

    Max Kw boiler size for 3 port valve.

    Hello all, perhaps some one can tell me..is there a maximum size of kw boiler that can be used with a 3 port valve? The system is a gravity fed, 2 pipe system system with a heat only boiler. British Gas have said the 3 port valve needs replacing with 2 2 port valves as the a 3 port should not...
  2. woodsy

    Ensuite size ?

    Been asked if there's a regulation size under building regs for an ensuite room - never really considered it
  3. M

    Water tank size

    I'm doing up my first house which is a large victorian terrace and need to install a new water tank in the loft. It only supplies the hot water system (cold is from the mains). Can anybody tell me how I calculate the size I'd need as the old one is basically an old baby's bath :blush2: The...
  4. C

    Boiler size

    Hi all. Wondering if any one can help out. We are having a new grant external blue combi fitted on a project we are working on. The total rad kW is about 12000. There is one main bathroom with poss combi fed shower. An on suite with Elec shower, downstairs toilet and kitchen. Engineer is...
  5. A

    Gas pipe size calculation

    Hi all! I am looking to see if anyone uses a good gas pipe size calculation app! I have been been plumbing and installing gas for over 12 years so obviously I know how to work it out long hand, I just want to see if any of these apps are worth the money to save myself time over the year! Thanks
  6. Eyespy999

    Magnaclean Micro / professional full size

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  7. P

    Confused about BSP thread size

    Hi. I'm a new member so please be gentle with me! I have a narrowboat and have been experiencing some problems with the exhaust leaking fumes. I have fitted a new flexible coupling because the old bellows had split but now find that the silencer has rusted through and needs replacing. I need to...
  8. spanner

    increase pipe size

    Hi lads. Just realised I'm about to remove a Potterton combi which has 15mm gas feed. A MAIN combi going for installation and the pipe size is 22mm Pipework is totally concealed atm and there's about a 1500mm of 15mm accessible pipe run to the old Potterton Is there such a fitting or a...
  9. A

    What size boiler do I need?

    Hi everyone. I'm looking to change my Worcester 28i junior in my house as its over 10 years old now and always breaks down. I've for a 4 storey house and have a total of 9 radiators. The boiler is currently at the bottom floor, kitchen on the 1st floor and bathroom on the 2nd floor. What boiler...
  10. A

    Tap flexible hose wrong size connector

    Hello, I have very little knowledge of plumbing and I stupidly bought a Grohe mixer tap from Amazon to replace an existing bathroom tap, link is here: https://www.amazon.co.uk/gp/product/B00WBIH962/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1 The flexi hoses it comes with are of a size that...
  11. 1

    Which size boiler would people recommend?

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  12. D

    Gas size from small to big

    Hi, I have asked people in the gas industry this question more than once and no one can ever give me a straight answer or a reliable one. I know the reason why gas pipe should be installed from big to small. But what happens if say for example you connect 22mm gas pipe to 15mm, in terms of...
  13. R

    Advice on new oil tank size camray 5 19-26kw boiler

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  14. A

    Shower tray replacement. With pics, size issue

    Got sent to this job last night, shower tray is cracked. needs replacing, could damage tiles but priority us getting the new tray in and worrying about the tiles after. Customer wants an "anti slip" tray. The tray is on legs. length ways wall to wall it measures 1170, allowing for what's...
  15. B

    Help with McAlpine Bottle Trap size and fitting problem.

    Hi, I am going insane with this issue. I recentrly removed a McAlpine Anti Syphon Bottle trap from my basin, and purchased an identical one from Screwfix. This is the item. http://www.mcalpineplumbing.com/1-188-anti-syphon-bottle-trap.html?id=943 But, I had to return it because I couldn't...
  16. G

    Outlet size for a 3/4" Garden tap?

    I'm trying to replace an old outdoor tap that is connected to some MDPE piping (the house is built on an old road depot and it was an existing installation). It has a "Round Mixer Tap Connector" for the hose but it leaks like crazy and when I took the tap off to have a look, I was sure there...
  17. G

    Boiler size question

    Looking to swap out an old potterton on Promax 30 kW wall hung boiler at a mates house he wants a vaillant, I suggested we get a like for like 30kw if all is working fine but noticed all pipe work to the boiler is 28mm vaillant connections are 22mm, would i go up a size to the 438 to counter...
  18. M

    Hot water cylinder size

    Hi all, I have a customer who is complaining of not having enough hot water. Its a father and 19 year old son, 2 bed cottage, 1 bath, 1 basin, 1 kitchen sink. The old cylinder is 450 x 900 indirect, although there is no boiler in the cottage, there are pipes connected to the coil which seem to...
  19. M

    Old steel pipe thread size

    Hi, I tried to fit a new basin yesterday, the taps are connected to old steel pipe in my 30's house. The thread on the steel t-piece is slightly larger than 22mm, more like 23mm or perhaps of imperial it's supposed to be 7/8 inch. I need a coupler from this thread to 15mm but can't find any...
  20. M

    Waste size slightly smaller than inch and 1/4

    Went to an emergency call out today at a hair salon that has a load of foreign basins and traps are all leaking. I need to change them out but my problem is that the waste shank is slightly smaller than inch and 1/4 - like almost fits. Anyone know any other sizes it could possibly be or suggest...
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