12.5-Inch Heart of the Hide First Base Mitt

12.5 in
Web Pro H
Steerhide
Break-in game-ready
Closing medium

Rawlings 12.5-Inch Heart of the Hide First Base Mitt, first base mitts: photo from Rawlings — Photo: Rawlings

Facts as the maker states them, read 20 Oct 2026

Heart of the Hide 12.5-inch first base mitt in the FM18 pattern with a Pro H web, top grade U.S. steer hide shell in black with camel laces and binding, shell palm leather lining and a redesigned heel pad, offered in right- and left-hand throw. Listed as R2G with a Player Break-In figure of 35, Adult level, and age groups from Pro/College down to 10U.

Type	First base mitt
Size	12.5 in What this means Measured from the heel to the top of the index finger. Infielders use smaller gloves (10.25 to 11.75 in) for quick transfers; outfielders larger (12 to 12.75 in); first base and catcher's mitts are measured differently. Tip: Bigger is not better for a young infielder. A glove they can close beats a glove that looks like a pro's.
Web	Pro H
Leather	Top Grade U.S. Steer Hide What this means Heavy, durable adult-cattle leather. Stiff at first, lasts for years. Most pro lines use it.
Custom	Yes
Hand	Right-hand throw or left-hand throw
Ages	Pro/College, High School, 14U, 12U, 10U
Level	Adult
Also on the page	Back: Conventional Color: Black Fit: Standard Lace: Pro Grade Leather Laces Lining: Shell Palm Leather Padding: Redesigned Heel Pad Pattern: FM18 Player Break-In: 35 Shell: Steer Hide Leather Special Feature: R2G Sport: Baseball Usage: Gloves breathable moisture wicking liner (description)
Availability	Out of stock
Maker SKU	PRORFM18-17BCS
The maker says	The FM18 pattern allows for a deep pocket to ensure a secure squeeze. Pairs with the Modified Pro-H web making every pick and throw a non-issue. Heart of the Hide leather is ultra-durable. Requires little to no break-in for a more game ready feel. Thinner heel pad allows for an easier close.
Source	rawlings.com, product page, read 20 Oct 2026

Pat's Grade one person's opinion, with the reason

Not yet graded

Patrick has not graded this line yet. A line not handled yet says Not yet graded, never a low grade.

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Evidence public reviews and break reports, with links

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What "buyer reports" means

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$329.99maker’s price, read 20 Oct 2026

See it on Rawlings's siteNo buy route yet: this link goes to the maker, and we earn nothing from it.

Fit profile

Stated comes off the maker's page; derived is worked out from what the maker states: its words, its leather, its numbers; graded is Patrick's call; unknown means the class is not known yet.

LeatherstatedSteerhide
Break-instatedGame-readyStated: page uses break-in or softness wording.
What this means
Soft out of the box and usable the first day. Made with softer leather that will not last as long as a stiff pro glove, which is fine for a growing player.
Tip: For most players under 12 this is the right answer.
Closing effortderivedMediumDerived from break-in class.
What this means
How hard a young hand has to squeeze to close the glove on a ball. Easy means a soft build and a smaller pattern; hard means stiff leather or a big mitt.
Tip: If your player drops balls that hit the pocket, closing effort is usually the reason, not the hands.
PocketunknownNot known
BackunknownNot known
Hand openingunknownNot known

Does it fit my player?

Compare with: Akadema ADJ154 First Base (LHT Special), Mizuno GXF90B5 Franchise 12.5" Baseball First Base Mitt, SSK Baseball SSK Z5 Craftsman 12.5" Baseball First Base Mitt Z5-1250CMLCOL9. Same kind of glove, same size.