12mm vs 16mm Massage Gun (2026)

12mm vs 16mm massage gun at a glance

On the 12mm side, both HEYCHY listings state 12 mm amplitude at up to 2500 percussions per minute, five speeds from 1300 to 2500 RPM, brushless motors and 10-minute auto shut-off. The S5-Pro-A states FSA/HSA in its title, and the infrared model says it may qualify for FSA or HSA purchasing options. On the 16mm side, both BOB AND BRAD listings reach 16 mm amplitude, with 85 lbs of stall force stated, six speeds from 1500 to 2500 RPM, 2500mAh batteries and FSA/HSA eligibility. The D6 Ultra Max adds a twist: its amplitude is adjustable from 8 to 16 mm in 1 mm steps, so it covers both sides of this comparison in one device.

Amplitude: what the listings state

The HEYCHY S5-Pro-A states 12 mm amplitude with a titanium alloy massage head. The HEYCHY infrared model states 12 mm amplitude with 5 heads. The D6 Pro Max+ states a fixed 16 mm amplitude. The D6 Ultra Max states 9 amplitude settings from 8 mm to 16 mm in 1 mm steps, and its listing calls it the first to put depth itself on the dial. The 16 mm stroke is deeper as a stated figure, and the adjustable model spans both sides of this comparison.

Stall force and speeds

The two BOB AND BRAD listings each state 85 lbs of stall force, which their listings frame as driving through dense muscle under full body weight. The HEYCHY listings state no stall force figure, which is a gap, not a loss: their listings describe brushless motors without a number. Speeds are close: 1300 to 2500 RPM on the HEYCHY pair, 1500 to 2500 RPM on the BOB AND BRAD pair. Only the 16mm side states a stall force number.

Heat, cold and infrared

The HEYCHY S5-Pro-A states hot and cold heads: heat from 100 to 120 F and cooling from 50 to 68 F. The HEYCHY infrared model states two heat levels at 104 and 113 F with infrared and overheat protection. The D6 Ultra Max states a patented infrared head with 660 nm and 850 nm light and dual-level warmth at 104 and 113 F. The D6 Pro Max+ states heat and cold modes. All four state some form of thermal feature. Infrared appears on three listings: the D6 Ultra Max states a patented infrared head, the HEYCHY infrared model states an infrared heating head, and the S5-Pro-A lists infrared heating among its special features. The D6 Pro Max+ states heat and cold modes instead.

Battery and weight

The HEYCHY pair states 2000 mAh and 2200 mAh batteries with up to 10 days of use on daily 30-minute sessions, both at 1.8 pounds. The BOB AND BRAD pair each states a 2500mAh battery with PD fast charging, both at 2.8 pounds. The 12mm side is the lighter stated build; the 16mm side states the larger battery. Every listing here states a 10-minute auto shut-off.

Warranties, as stated

The D6 Ultra Max states a 2-year warranty. The other three state no warranty term. For a motor-driven device, the stated 2 years is the only promise on any page here.

Gear for each side

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

Choose 12mm if

Choose a 12mm gun if you want the lighter stated build at 1.8 pounds, heat and cold heads, and FSA/HSA eligibility without the deepest stroke. The HEYCHY listings describe daily muscle care for office workers and athletes, with dynamic balance technology stated to reduce hand vibration.

Choose 16mm if

Choose a 16mm gun if you want the deeper stated stroke and the stated 85 lbs of stall force. The D6 Ultra Max is the flexible pick with its stated 8 to 16 mm adjustable amplitude and 2-year warranty; the D6 Pro Max+ is the fixed 16 mm pick with heat and cold modes. Both state 8 attachments and a parallelogram arm for hard-to-reach areas.

Check Your Space First

• All four are battery powered and cordless; the BOB AND BRAD pair states PD fast charging.
• The 16mm pair states 2.8 pounds each; the 12mm pair states 1.8 pounds each.
• The 12mm pair measures about 5.5 by 2.4 by 8.3 in; the 16mm pair about 10.55 by 3.15 by 7.64 in.
• Three listings state Not Water Resistant and the fourth states nothing on water resistance; store them dry.

Common questions

Is 16mm too deep for shoulders?

The D6 Ultra Max states its 8 mm setting for shoulders and smaller muscle groups, and 16 mm for quads, glutes and hamstrings. The fixed 16 mm D6 Pro Max+ has no shallow setting.

Which of these states a warranty?

The D6 Ultra Max states a 2-year warranty. The other three state no warranty term.

Which mention FSA or HSA?

Three listings state FSA/HSA eligibility; the infrared HEYCHY says it may qualify for FSA or HSA purchasing options.

Which is the lightest?

The two HEYCHY listings each state 1.8 pounds. The BOB AND BRAD pair each states 2.8 pounds.

Do any state a stall force?

The two BOB AND BRAD listings each state 85 lbs. The HEYCHY listings state no stall force figure.

Related guides

See shiatsu vs percussion massage gun, cordless vs corded massage gun and massage gun vs back massager.