Flat (more or less) Rulers

How about a non-folding ruler for you shop? I don’t think I could get along without my Starrett 6 inch ruler in my apron pocket

https://www.amazon.com/Starrett-C604RE-6-Tempered-Graduations-Thickness/dp/B0002FULFM/ref=sr_1_1?ie=UTF8&qid=1476996586&sr=8-1&keywords=C604RE-6

I also often use the blades from my Starrett combination squares as rulers:

But what about other specialty rulers that folks sell?

I did a bit of looking around on the internet and found these:

For Rivets

https://www.amazon.com/M95623-MARSON-TOOL-PART-RULE/dp/B00EIPPK9Y/ref=sr_1_1?ie=UTF8&qid=1476997102&sr=8-1&keywords=marson+M95623

Dividing Rule

http://www.leevalley.com/US/wood/Page.aspx?p=32575&cat=1,43513,51657

Versa Ruler

https://www.amazon.com/Versa-Ruler-Multi-sided-Shape-making-4-pack/dp/B008UX4EGU/ref=sr_1_1?ie=UTF8&qid=1476997274&sr=8-1&keywords=versa+ruler

Ring Ruler

https://www.amazon.com/Ruler360-Adjustable-Circular-Ruler-Circle-making/dp/B008UX4DS4/ref=sr_1_2?ie=UTF8&qid=1476997163&sr=8-2&keywords=versa+ruler

https://www.amazon.com/Koala-Tools-Sewing-Ruler-Metric/dp/B008UX4E6A/ref=sr_1_1?ie=UTF8&qid=1476999771&sr=8-1&keywords=728028208368

Data Ruler

https://www.amazon.com/Westcott-Products-Highlighting-see-through-highlight/dp/B00FZYMMB6/ref=sr_1_2?ie=UTF8&qid=1476997480&sr=8-2&keywords=computer+data+ruler

https://www.amazon.com/Westcott-Processing-Magnifying-Ruler-Clear/dp/B001B0D82A/ref=sr_1_1?ie=UTF8&qid=1476997480&sr=8-1&keywords=computer+data+ruler

Graph Ruler

https://www.amazon.com/C-Thru-Metric-Transparent-Ruler-12/dp/B0027AGE2E/ref=sr_1_1?ie=UTF8&qid=1476997653&sr=8-1&keywords=088359009974

https://www.amazon.com/Westcott-Inches-Metric-12-Inches-W-30/dp/B007SQ0LDU/ref=sr_1_2?ie=UTF8&qid=1476997653&sr=8-2&keywords=088359009974

Bike Spoke Ruler

https://www.amazon.com/PARK-SBC-1-Spoke-Bearing-Cotter/dp/B003L9ED0K/ref=sr_1_2?ie=UTF8&qid=1476997956&sr=8-2&keywords=763477006301

Protractor Ruler

https://www.amazon.com/Quint-Measuring-Systems-112Q-Precision/dp/B0002EXEXY/ref=sr_1_1?ie=UTF8&qid=1476997218&sr=8-1&keywords=701926112432

https://www.amazon.com/Quint-Measuring-Systems-123-Precision/dp/B0002EXEYI/ref=sr_1_1?ie=UTF8&qid=1476997335&sr=8-1&keywords=701926123438

https://www.amazon.com/Starrett-CP505A-12-ProSite-Combination-Protractor/dp/B01LXTREY7/ref=sr_1_4?ie=UTF8&qid=1476997260&sr=8-4&keywords=prosite

https://www.amazon.com/Starrett-505A-7-ProSite-Protractor/dp/B000B8N0SU/ref=sr_1_1?ie=UTF8&qid=1476997260&sr=8-1&keywords=prosite

https://www.amazon.com/General-Tools-823-Digital-10-Inch/dp/B00563TM6O/ref=sr_1_fkmr0_3?ie=UTF8&qid=1476998363&sr=8-3-fkmr0&keywords=alumicolorcenter%2Bfinder%2Bruler&th=1

https://www.amazon.com/Stainless-Digital-Goniometer,angle-Ruler,angle-Definition,ruler/dp/B012699WDI/ref=sr_1_fkmr0_4?ie=UTF8&qid=1476998265&sr=8-4-fkmr0&keywords=alumicolorcenter+finder+ruler
http://www.ebay.com/itm/HQ-Angle-Engineer-Protractor-Finder-Measure-Arm-Ruler-Gauge-Tool-Brass-Fittings-/401090354295?hash=item5d62d91c77:g:yAIAAOSwxvxW61VV

Hobby Rulers

https://www.amazon.com/AMACO-11051J-PolyRuler/dp/B00188AR24/ref=sr_1_1?s=office-products&ie=UTF8&qid=1476998812&sr=8-1&keywords=039672110519

https://www.amazon.com/Hobbico-HCAR0482-Builders-Ruler-7/dp/B000X4MS1W/ref=sr_1_1?ie=UTF8&qid=1476998732&sr=8-1&keywords=708066704824

https://www.amazon.com/Midwest-Products-Hobby-Craft-Ruler/dp/B0006O2AJE/ref=sr_1_1?ie=UTF8&qid=1476998799&sr=8-1&keywords=091157011254

https://www.amazon.com/Woodland-Scenics-Derby-Wheel-Alignment/dp/B0006O085M/ref=sr_1_1?ie=UTF8&qid=1476998840&sr=8-1&keywords=724771004561

http://www.ebay.com/itm/1Pc-String-Action-Gauge-Ruler-Guide-Setup-Measuring-Luthier-Tool-For-Guitar-Bass-/131941777438?hash=item1eb857c01e:g:IeMAAOSw4shX3PBd

http://mnpctech.com/pc-mod-tools/pc-mod-ruler/pc-modder-ruler-and-gauge.html

https://www.amazon.com/Adafruit-Industries-21-14610-Reference-Ruler/dp/B00JFJDZ5Y/ref=sr_1_1?ie=UTF8&qid=1477000593&sr=8-1&keywords=TAP+%26+DRILL+REFERENCE+RULER

Model RR Rulers

https://www.amazon.com/Mascot-Model-Railroad-Scale-Rule/dp/B00065CMSW/ref=sr_1_3?ie=UTF8&qid=1476999239&sr=8-3&keywords=MODEL+RAILROAD+RULER

https://www.amazon.com/Excel-Deluxe-Model-Railroad-Reference/dp/B000BQJDB0/ref=sr_1_1?ie=UTF8&qid=1476999123&sr=8-1&keywords=MODEL+RAILROAD+RULER

General Purpose Rulers

https://www.amazon.com/Empire-Level-27303-Stainless-6-Inch/dp/B0015YNL8I/ref=sr_1_1?ie=UTF8&qid=1476997403&sr=8-1&keywords=046609273032

https://www.amazon.com/C-Thru-Flexible-Steel-Cork-Ruler/dp/B00CHQJX76/ref=sr_1_1?ie=UTF8&qid=1476997763&sr=8-1&keywords=088359006195

https://www.amazon.com/Helix-Acrylic-Office-12-Inch-15012/dp/B000J66UBS/ref=sr_1_1?ie=UTF8&qid=1476997757&sr=8-1&keywords=079252150122

https://www.amazon.com/Starrett-C604RE-12-Tempered-Graduations-Thickness/dp/B0002FULFW/ref=sr_1_1?ie=UTF8&qid=1476997883&sr=8-1&keywords=049659526615

https://www.amazon.com/Starrett-C604R-18-Tempered-Graduations-Thickness/dp/B0002FULMK/ref=sr_1_1?ie=UTF8&qid=1476997923&sr=8-1&keywords=049659526806

Straight Edges

https://www.amazon.com/Stanley-45-101-24-Inch-MaxStick-Straight/dp/B00009P8AJ/ref=sr_1_1?ie=UTF8&qid=1476997963&sr=8-1&keywords=076174451016

https://www.amazon.com/Swanson-AE144-72-Inch-Straight-Yellow/dp/B0008JF0SU/ref=sr_1_1?ie=UTF8&qid=1476997997&sr=8-1&keywords=038987001444

Center Finders

https://www.amazon.com/INCRA-CENTER12-Centering-Rule-12-Inch/dp/B002GU68M6/ref=sr_1_1?ie=UTF8&qid=1476998100&sr=8-1&keywords=751922812010

https://www.amazon.com/Big-Horn-19109-Center-24-Inch/dp/B002LVUWKO/ref=sr_1_1?ie=UTF8&qid=1476998292&sr=8-1&keywords=center+finder+ruler

Scales

https://www.amazon.com/Alumicolor-Engineer-Pocket-Scale-Silver/dp/B000KNKZ1Q/ref=sr_1_1?ie=UTF8&qid=1476998303&sr=8-1&keywords=alumicolor

https://www.amazon.com/Alumicolor-Pocket-Architect-Scale-Black/dp/B000KNP55C/ref=sr_1_2?ie=UTF8&qid=1476998303&sr=8-2&keywords=alumicolor

https://www.amazon.com/Woodrow-Civil-Engineering-Bevel-Ruler/dp/B012OHBF4Q/ref=sr_1_18?ie=UTF8&qid=1476998551&sr=8-18-spons&keywords=engineer+scales&psc=1

https://www.amazon.com/dp/B012OHB848?ref_=ams_ad_dp_asin_1

Printing Rulers

https://www.amazon.com/Schaedler-Precision-Ruler-Single-Metric/dp/B005FSGUAG/ref=sr_1_1?ie=UTF8&qid=1476999433&sr=8-1&keywords=096768000154

https://www.amazon.com/Gaebel-Printers-Line-Gauges-18/dp/B004BNFM6Y/ref=sr_1_3?ie=UTF8&qid=1476999541&sr=8-3&keywords=printers+ruler

https://www.amazon.com/Westcott-LetterCraft-12-Inch-Graphic-GA-96/dp/B000KNPFKC/ref=sr_1_1?ie=UTF8&qid=1476999438&sr=8-1&keywords=printers%2Bruler&th=1

https://www.amazon.com/Westcott-LetterCraft-Scales-18-Inch-B-90/dp/B001E1X6ZA/ref=sr_1_3?ie=UTF8&qid=1477001378&sr=8-3&keywords=pica+rule

Parallel Ruler

https://www.amazon.com/Westcott-Folding-Parallel-Ruler-1500-18/dp/B000XBGNLG/ref=sr_1_3?ie=UTF8&qid=1476999640&sr=8-3&keywords=printer%2Bruler&th=1

https://www.amazon.com/Alvin-Rolling-Parallel-Ruler-306/dp/B001DKM8CO/ref=sr_1_2?ie=UTF8&qid=1476999559&sr=8-2&keywords=parallel+ruler

https://www.amazon.com/Alvin-10-Professional-Parallel-Glider/dp/B001OA02KI/ref=sr_1_4_a_it?ie=UTF8&qid=1476999559&sr=8-4&keywords=parallel+ruler

https://www.amazon.com/Weems-Plath-Parallel-140-Aluminum/dp/B000KDVV00/ref=sr_1_5?ie=UTF8&qid=1476999559&sr=8-5&keywords=parallel+ruler

Mat Cutting Straightedge

https://www.amazon.com/Adapt--Cutting-Guides-adapt--cutting/dp/B0016ZNAUU/ref=sr_1_1?ie=UTF8&qid=1476999662&sr=8-1&keywords=008957054008

Curve Rulers

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=720193121121

https://www.amazon.com/gp/product/B000RZ889S/ref=s9_acsd_hps_bw_c_x_1

https://www.amazon.com/gp/product/B002TVUL4I/ref=s9_acsd_hps_bw_c_x_8

https://www.amazon.com/Adjustable-Ruler-Radius-Arc-Measurement/dp/B000HEQNIC/ref=sr_1_1?srs=7674381011&ie=UTF8&qid=1476999947&sr=8-1&keywords=088354158257

https://www.amazon.com/HAND-Multi-Purpose-Fashion-Scales/dp/B008OTETKQ/ref=sr_1_1?ie=UTF8&qid=1477000007&sr=8-1&keywords=B008OTETKQ

https://www.amazon.com/gp/product/B004BNEUC6/ref=s9_acsd_hps_bw_c_x_9

https://www.amazon.com/NO-3250-Purpose-Fashion-Grader’s-Straight/dp/B00EXO7692/ref=sr_1_1?s=office-products&ie=UTF8&qid=1477000106&sr=8-1&keywords=CURVED+GRADER'S+RULER+-+55+CM

https://www.amazon.com/Dritz-832-Styling-Design-Ruler/dp/B001BDEOVG/ref=sr_1_1?ie=UTF8&qid=1477000316&sr=8-1&keywords=072879252026&th=1

https://www.amazon.com/Cousin-Flexible-Curve-Ruler-12-Inch/dp/B000WR4110/ref=sr_1_1?ie=UTF8&qid=1477000209&sr=8-1&keywords=701926631124

https://www.amazon.com/C-Thru-30-Inch-Flexible-Curved-Ruler/dp/B004IXML16/ref=sr_1_1?ie=UTF8&qid=1477000256&sr=8-1&keywords=088359009356

https://www.amazon.com/Alvin-Truflex-Lightweight-Flexible-A1044-24/dp/B004Y740SI/ref=sr_1_1?ie=UTF8&qid=1477000294&sr=8-1&keywords=088354939733&th=1

Phi (Golden Ratio) Rulers

http://www.leevalley.com/US/wood/Page.aspx?p=57625&cat=1,43513

Stop Rulers

http://www.leevalley.com/US/wood/page.aspx?p=61607&cat=1,43513

Hook Rulers & T-End Rulers

https://www.amazon.com/Incra-T-RULE12-12-Inch-Precision-Marking/dp/B00004TRBX/ref=sr_1_1?ie=UTF8&qid=1477000367&sr=8-1&keywords=751922512033&th=1

https://www.amazon.com/ADJUSTABLE-HOOK-RULER-Peachtree-Woodworking/dp/B001N1JI6M/ref=sr_1_1?ie=UTF8&qid=1477000424&sr=8-1&keywords=810948014935

http://www.leevalley.com/US/wood/Page.aspx?p=40923&cat=1,43513

https://www.amazon.com/OLipfa-18-Inch-5-Inch-Edge-Ruler/dp/B000YZARFO/ref=sr_1_1?ie=UTF8&qid=1477000504&sr=8-1&keywords=021251115183&th=1

https://www.amazon.com/OLipfa-4-Inch-by-36-Inch-Lip-Edge-Ruler/dp/B000YZ5U1U/ref=sr_1_1?ie=UTF8&qid=1477000550&sr=8-1&keywords=021251666364&th=1

Metalworking Rulers

https://www.amazon.com/General-Tools-715-Drill-Reference/dp/B000LDN0RQ/ref=sr_1_2?ie=UTF8&qid=1477000593&sr=8-2&keywords=TAP+%26+DRILL+REFERENCE+RULER

https://www.amazon.com/Lufkin-954FT-4-Inch-Tinner-Foot-Circumference/dp/B000ZUDNPE/ref=sr_1_1?ie=UTF8&qid=1477000742&sr=8-1&keywords=037103450999

Yardsticks

https://www.amazon.com/1260-64-Inch-36-Inch-Aluminum-Yardstick/dp/B000I19F84/ref=sr_1_1?ie=UTF8&qid=1477001589&sr=8-1&keywords=037103453808

https://www.amazon.com/MASTER-MAGNETICS-TV587602-Magnet-Measuring/dp/B000BQPW92/ref=sr_1_1?ie=UTF8&qid=1477001661&sr=8-1&keywords=095421072866&th=1

https://www.amazon.com/Starrett-MS-2-Aluminum-Straight-Length/dp/B004RI53JE/ref=sr_1_2?ie=UTF8&qid=1477001555&sr=8-2&keywords=meter%2Bstick&th=1

Sewing – Seam allowance rulers _ There must be hundreds of different ones – especially for quilting – but here are a few.

https://www.amazon.com/ruler-pattern-drafting-adding-allowances/dp/B00JGBF7CA/ref=sr_1_1?ie=UTF8&qid=1477000948&sr=8-1&keywords=seam+allowance+ruler

https://www.amazon.com/Dritz-862-Super-Seamer-Ruler/dp/B000A88M0C/ref=sr_1_2?ie=UTF8&qid=1477000860&sr=8-2&keywords=seam+allowance+ruler

https://www.amazon.com/Wrights-670140-Seams-Right-Sewing/dp/B005574WQG/ref=sr_1_5?ie=UTF8&qid=1477000860&sr=8-5&keywords=seam+allowance+ruler

https://www.amazon.com/Quilters-Rule-Seam-Guide-7-Inch-1-Inch/dp/B0018N5X1E/ref=sr_1_8?ie=UTF8&qid=1477000860&sr=8-8&keywords=seam+allowance+ruler

https://www.amazon.com/Sew-Easy-Triangle-Patchwork-Allowance/dp/B003UN5V4E/ref=sr_1_13?ie=UTF8&qid=1477000860&sr=8-13&keywords=seam+allowance+ruler

https://www.amazon.com/Wrights-139001A-Acrylic-Leftie-Righties/dp/B007QNXERK/ref=sr_1_16?ie=UTF8&qid=1477000860&sr=8-16&keywords=seam+allowance+ruler

https://www.amazon.com/HQ-Versa-Tool-Handi-gadgets/dp/B004KZ419M/ref=sr_1_1?ie=UTF8&qid=1477001151&sr=8-1&keywords=890802001288

https://www.amazon.com/Quilt-Day-Mini-Ruler-Pieces/dp/B0018NDKYQ/ref=sr_1_1?ie=UTF8&qid=1477001782&sr=8-1&keywords=735272020202