{ "action": "Product-SizeChart", "queryString": "cid=pdp-content-section-fit-guide-mainline", "locale": "en_US", "success": true, "content": "\r\n\r\n\r\n \r\n \r\n SPY Fit Guide\r\n \r\n \r\n\r\n\r\n\r\n \r\n
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SPY Optic

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Frame Fit
Guide

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Find your fit using frame specs or learn to measure at home.

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This Frame
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How to Measure
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Frame Diagrams

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\r\n \"Front\r\n Front View\r\n
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\r\n \"Profile\r\n Profile View\r\n
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Frame Measurements

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Temple Width
145 mm
Temple Length
140 mm
Lens Height
50 mm
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Frame Fit

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Temple pressure & nose bridge snugness.

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SM
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MD
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LG
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XL
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Frame Size

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Overall frame footprint from temple end to end.

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SM
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MD
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LG
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XL
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\r\n All you need is a flexible measuring tape or a piece of string and a ruler. Take measurements on bare skin for best accuracy.\r\n

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3 Key Measurements

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1
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Temple Width
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\r\n Wrap a tape around your head just above your brows and ears. Divide that number by 2 for your half-head width. Match to Temple Width for a pressure-free fit.\r\n

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2
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Temple Length
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\r\n Measure from the hinge of an existing pair to the tip of the arm. Most adults need 135–150mm. Shorter arms sit forward; longer arms hook further behind the ear.\r\n

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3
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Lens Height
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\r\n Measure vertically from your brow bone to your cheekbone. Smaller faces fit 35–42mm; larger faces 44mm+.\r\n

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Quick Size Reference

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SizeTemple WidthTemple Arm
SM125 – 132mm130 – 135mm
MD133 – 140mm135 – 140mm
LG141 – 148mm140 – 145mm
XL149mm+145mm+
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Pro Tip
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\r\n If you're between sizes, go up — a slightly wider frame is easier to adjust than one that pinches. Our lenses are surfaced for optical clarity edge-to-edge, so coverage won't suffer.\r\n

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\r\n Measurements may vary slightly by colorway. Questions? Chat with our team.\r\n

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