Socket Sizes in Order From Smallest to Largest

You’d think that a list of socket sizes in order would be pretty simple. Well, there’s a bit more to it than that. Along with the two different measurement standards (metric and SAE), you also have to consider what size drive you’re using. Whether you just got your first socket set, want to know which sizes you’re missing in your socket organizer, or simply need a quick reference to see if a metric size converts to SAE, check out the tables below to see the all socket sizes from smallest to largest.

Note: No single socket set will include all the sizes listed below nor would you ever need them all. Other sizes may be available but are probably too obscure to include.

Metric Socket Sizes Chart

1/4" Drive3/8" Drive1/2" Drive3/4" Drive1" Drive
4mm5.5mm8mm19mm36mm
4.5mm6mm9mm20mm38mm
5mm7mm10mm21mm41mm
5.5mm8mm11mm22mm46mm
6mm9mm12mm23mm50mm
7mm10mm13mm24mm54mm
8mm11mm14mm25mm55mm
9mm12mm15mm26mm58mm
10mm13mm16mm27mm60mm
11mm14mm17mm28mm63mm
12mm15mm18mm29mm65mm
13mm16mm19mm30mm67mm
14mm17mm20mm31mm70mm
15mm18mm21mm32mm71mm
19mm22mm33mm75mm
20mm23mm34mm77mm
21mm24mm35mm80mm
22mm25mm36mm
26mm38mm
27mm40mm
28mm41mm
30mm42mm

SAE Socket Sizes Chart

1/4" Drive3/8" Drive1/2" Drive3/4" Drive1" Drive
5/32"1/4"3/8"7/8"1-5/8"
3/16"5/16"7/16"15/16"1-11/16"
7/32"3/8"1/2"1-1/16"1-3/4"
1/4"7/16"9/16"1-1/8"1-13/16"
9/32"1/2"19/32"1-3/16"1-7/8"
5/16"9/16"5/8"1-1/4"2"
11/32"5/8"21/32"1-5/16"2-1/8"
3/8"11/16"11/16"1-3/8"2-3/16"
7/16"3/4"3/4"1-7/16"2-1/4"
1/2"13/16"25/32"1-1/2"2-3/8"
9/16"7/8"13/16"1-5/8"2-1/2"
15/16"7/8"1-11/16"2-5/8"
1"15/16"1-3/4"2-3/4"
1"1-13/16"2-15/16"
1-1/16"1-7/8"3"
1-1/8"2"3-1/8"
1-3/16"2-1/8"
1-1/4"2-3/16"
1-1/2"2-1/4"

SAE to Metric Conversion Chart

Ever come across a nut or bolt where you need two of the same size wrench? Can't find a certain size of standard wrench or socket and want to know what the metric equivalent (or vice versa)? This chart will help.
SAE SizeMetric SizeInches Decimal 
5/32"0.1565/32" and 4mm are
close enough
4mm0.157
3/16"0.188
5mm0.197
7/32"0.219
6mm0.236
1/4"0.250
7mm0.276
9/32"0.281
5/16"0.3135/16" and 8mm are
close enough
8mm0.315
11/32"0.344
9mm0.354
3/8"0.375
10mm0.394
13/32"0.406
11mm0.4337/16" and 11mm are
close enough
7/16"0.438
15/32"0.46915/32" and 12mm are
close enough
12mm0.472
1/2"0.500
13mm0.512
17/32"0.531
14mm0.551
9/16"0.563
15mm0.59119/32" and 15mm are
close enough
19/32"0.594
5/8"0.625
16mm0.630
21/32"0.656
17mm0.669
11/16"0.688
18mm0.709
23/32"0.719
19mm0.7483/4" and 19mm are
close enough
3/4"0.750
25/32"0.781
20mm0.787

Wrench Sizes Smallest to Largest

The above tables apply not only to sockets but also wrenches. Many of the sizes listed are especially uncommon to wrenches but the smallest to largest order remains the same in both Standard and Metric.

 

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