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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. P

    22mm Fitting, thread size please ?

    Hello. Could anyone please advise ? What is the thread of a standard ( as used in UK ) 22mm compression fitting ? It appears to be 14 tpi but is slightly larger than 3/4 bsp. Thank you, Pete.
    • Peter3
    • Thread
    • 22mm america fitting please size thread usa
    • Replies: 4
    • Forum: USA
  2. Andrew Stride

    An old mains stopcock on an 30mm pipe needs replacing, please help.

    I need to replace the stopcock on an old mains water pipe. The house is about 60 years old, the pipes OD is 30mm, my local plum centre said they had no parts available to do this. The old stopcock is leaking and seized solid. Any advice about where I can get the parts to fix the problem would...
    • Andrew Stride
    • Thread
    • america correct help mains needs old pipe please replacing size still stopcock urgent usa water
    • Replies: 4
    • Forum: USA
  3. K

    newcombi-boiler size in doubt

    just fitted a gloworm 24 kw into a flat with 6 rads one bathroom previous boiler were a 42 kw floor mounted ancient Worcester . client wanted wall mounted new boiler, only problem now is the flow rate too much for the boiler and full the water is luke warm did think of reducing the flow but...
    • KTM
    • Thread
    • america combi size usa
    • Replies: 24
    • Forum: USA
  4. B

    New Kitchen Waste Run Correct Pipe Size

    Hello PFM's, I have the pleasure of doing my first waste run for a new kitchen installed in a flat and was hoping for some advice. I need a 6-metre run to the stack where I am going to mark my 1:40/1:110 and split the difference at a 1:80 gradient. It will be discharging the kitchen sink...
    • Bazzatron
    • Thread
    • america correct kitchen new pipe pipe size size usa waste
    • Replies: 8
    • Forum: USA
  5. A

    Air Release valve size for infra network.

    Hi all, I have more than 500meter potable water network line connecting to buildings, tanks say 25 branches which installed underground-main line starting from 125mm HDPE SDR11 to 40mm HDPE SDR11. What size of ARV to be used at ground level inside 600X600 ManHole.
    • ABU
    • Thread
    • air america network release size usa valve
    • Replies: 1
    • Forum: USA
  6. J

    Oil boiler size for large house

    Hi I’m looking to buy a new Combi oil boiler but don’t know what size to go for my old boiler was a Worcester heatslave 12/14 which was running originally 12 rads and one bathroom when I moved in. I then added a rad I believe it was to small to begin with as it was always breaking down it now...
    • john Reid
    • Thread
    • america boiler house large oil oil boiler size usa
    • Replies: 4
    • Forum: USA
  7. M

    Size of shower proformer in Wetroom - does size matter.

    Hi, I'm looking to change my downstairs bathroom to a Wetroom. It's currently an enclosed shower with a wooden floor on joists. I'm going to have the wooden floor remove and a Wetroom installed with a tiled floor. Please see picture of upstairs bathroom showing large tiles on the floor and...
    • miketurner201
    • Thread
    • impey matter proformer shower size tray wetroom
    • Replies: 3
    • Forum: Canada
  8. J

    Thermostatic Rad Valves, odd size Tails

    Hi first post here😀 I want to replace a couple of rad valves with TRVs but as you can see from the pic, the existing tails are bigger than it usual. All the valves I can find have 1/2” bsp Threads both sides, but I either need TRVs with one side to match the tails, or a reduced for the rad. Any...
  9. Stigster

    What size are the connections on these valves?

    From a thread where I've been helping someone with radiator valve problems. Looking at the pictures of thes towel rail valves I'm not 100% certain what size the connections are. Pretty sure it's 15mm coming in to the valve but is the rad-side connection 1/2" with a fat nut or 3/4"? If anyone...
  10. N

    Waste pipe size query

    Hi, I have a basin trap that has a 35mm chrome waste pipe supplied. I was wondering if this can converted to standard 32mm pipe as the chrome isn't long enough. I seems odd that the Chrome pipe isn't a standard size? Thanks
  11. G

    what size cable for 8.5kw shower

    Ive got an electric shower to replace, currenty 8.5 kw on a 6mm cable. Is it dumb to install 8.5kw on 6mm, im sure i used to do this years ago without thinking too hard about it. A quick bit of research recommends 7.5kw max rating. what would you do? Rewire for 10mm too expensive. Cheers.
  12. T

    Unvented cylinder size

    Hiya guys I currently specing a job for a 5 bedroom house with x5 ensuites. Could anyone advise me on sizing cals for unvented cylinders. Thank you
  13. R

    Where can I get the right size bleed key?

    I have some Pegler Terrier lock shields with drain off capability. A standard bleed key is too big as it appears they use a smaller square head on their valves. Anyone know where I can get a bleed key to fit. Thanks Graham
  14. A

    Recommendations for new combi boiler install

    Hello, I'm looking for advice on replacing a back gas fired boiler with a new combi boiler. I was thinking of placing the new combi boiler in the store room where the mains gas meter is located. Been looking a Worcester Greenstar 32CDI compact combi boiler but really looking for recommendations...
  15. J

    meter to boiler pipe size

    Hi, In the near future would like to change standard boiler for either same or combi , meter is at one corner of house and boiler diagonally opposite, pipe starts at 22mm from meter but ends up 15mm at boiler, concrete floors so assuming pipe goes up to and into 1st floor cavity and accross...
  16. J

    Isolator Valve for cold water supply - correct size

    Hello, I was hoping someone here might be able to help. I need to replace an isolator valve on the inlet supply to a toilet. It's a 1/2" fitting - one end is connected to the water supply with a compression fitting, and the other end fits on to the thread of the toilet inlet valve. The problem...
  17. B

    Pipe size and advice

    I am moving a radiator 4m across a single story extension. I haven't got access to the roof and I have a concrete floor. I am happy to route the pipe around the wall which would mean a pipe run of 6m. Should I use 22mm pipe or 15 mm. If I went across the floor it would be 4m but ruin the floor...
  18. S

    New Radiator Size Issue

    I have bought new radiators to replace my current ones (around 25 years old). Old radiators were all fitted with TRV's. I have put the new 15mm compression inserts into the radiator that came with the new valves/TRV's but this then makes the valves too wide to fit onto the existing pipes (by...
  19. L

    Stopcock size advice. MDPE-copper

    Good evening all, I am having problems renewing my stopcock as I don’t seem to be able to find the size I am after. I am running a new 22mm cold water main (existing is 15mm) to the loft in readiness for my boiler to be changed. I have bought what I thought was the right size 25mm - 22mm...
  20. J

    Combi Boiler Size advice

    I'm looking to have a Combi Boiler installed along with 8 Radiators in each room along with a Towel rail in the bathroom. I wanted to check with people what size combi boiler people think I need as I have had one company who has quoted me for a Worcester green star 28cdi compact boiler and have...
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