Most comparisons of the Graco SlimFit3 LX and the Chicco Fit3x start with width, because both are sold as slim seats for three-across rows. That’s where this one starts too, but it ends quickly: Graco and Chicco list the same 16.7 inches. If you came to settle a graco slimfit3 lx vs chicco fit3x question on width alone, the pages won’t settle it, so the rest of this guide looks at what they do list differently.
Researched: every spec and price below comes from Graco’s SlimFit3 LX page and Chicco’s Fit3x ClearTex page, read on October 6, 2026 (official spec). We haven’t used either seat, so neither is personally tested.
Quick Verdict: On paper the two seats tie on width at 16.7 inches. Chicco lists the lower price at $229.99 against Graco’s $299.99, and more recline and height-adjust positions. Graco lists a lighter seat at 19.2 lb and a cover that comes off in 60 seconds without uninstalling the seat. Pick Chicco if price and adjustment range matter most, and Graco if cleaning and weight do.
Table of Contents
Graco SlimFit3 LX vs Chicco Fit3x: The Specs Side by Side
Every row in this table appears on both manufacturers’ pages. Items only one page lists are in a separate section below, so the table compares like with like. We list numbers as the manufacturers print them; none is measured by us.
| Item (official spec) | Graco SlimFit3 LX | Chicco Fit3x ClearTex |
|---|---|---|
| Listed price | $299.99 (shown out of stock) | $229.99 |
| Width | 16.7 in | 16.7 in |
| Height | 24.5 in | 25 in (fully upright) |
| Depth or length | 20.7 in (product depth) | 21 in (assembled length) |
| Weight | 19.2 lb | 21.0 lb |
| Recline positions | 4 | 6 |
| Height adjustment | 10-position headrest and harness | 12 height-adjust positions |
| LATCH connector | InRight LATCH, push-button | Mini-Grip LATCH |
| Vehicle belt lock-off | Integrated belt lock-off | LockSure steel-reinforced lock-offs |
| Side-impact standard | FMVSS 213a | FMVSS 213a |
Two cautions before you compare rows. Graco calls its depth figure “product depth” and Chicco calls its figure the “assembled” length, so the 20.7 and 21 inches may not be measured the same way. And Graco’s page showed the seat as out of stock on October 6, so its price may change when it returns.
What the Two Pages Agree On
The listings are closer than the marketing suggests. Both seats convert through three modes, from rear-facing harness to forward-facing harness to a highback booster, and the two pages list the same weight range for each mode. We leave the numbers out on purpose, because limits belong in each seat’s manual and not in a comparison, and you should read both before buying.
Both pages also list the same side-impact standard, FMVSS 213a, though they word it differently. Graco says its seat is tested according to the standard, and Chicco says the seat is engineered to meet it. We won’t read more into that than the wording supports.
The biggest shared number is the width. Each seat is 16.7 inches wide, which is the figure our narrowest car seats for 3 across ranking uses for both. That means a row of three of either seat, or a mix of one of each, takes the same 50.1 inches on paper, and that is the number that goes into the fit math further down.
Where the Listings Differ
Price. Chicco’s page lists the Fit3x at $229.99 and Graco’s lists the SlimFit3 LX at $299.99, a gap of $70 at the prices we saw. Graco’s page also shows a plainer SlimFit 3-in-1 at $229.99, which we haven’t compared here, so match the model name before you compare prices anywhere else.
Recline and height adjustment. Chicco lists six recline positions and 12 height-adjust positions. Graco lists four recline positions and a 10-position headrest that moves together with the harness. More positions on paper may help with fitting a seat to a vehicle seat or a child, but the pages don’t say how much, so treat this as a point to test in your own car.
Installation hardware. Graco lists a push-button InRight LATCH it describes as a one-second attachment with an audible click, plus an integrated belt lock-off for forward-facing belt installs. Chicco lists Mini-Grip LATCH connectors and steel-reinforced LockSure lock-offs, along with two bubble level indicators for recline. Graco’s page also lists dual level indicators. Both offer LATCH and a belt installation. Which feels easier is something only your hands in your car can answer.
Weight. Graco lists 19.2 lb and Chicco lists 21.0 lb, which is 1.8 lb lighter for the Graco on paper. If you plan to move the seat between cars, weigh that against the other differences instead of treating it as a verdict.
Pros and Cons of Each Seat
Graco SlimFit3 LX
- Pro: the lighter listed weight, 19.2 lb.
- Pro: a RapidRemove cover that Graco says comes off in 60 seconds without uninstalling the seat or removing the harness, and is machine washable.
- Pro: two removable, easy-to-clean cup holders that Graco says are designed for a three-across installation.
- Con: the higher listed price, $299.99, and an out-of-stock listing when we checked.
- Con: fewer listed recline positions, four against Chicco’s six.
Chicco Fit3x ClearTex
- Pro: the lower listed price, $229.99.
- Pro: six recline positions and 12 height-adjust positions on the page.
- Pro: ClearTex fabrics that Chicco describes as flame retardant-free and GREENGUARD Gold certified for low chemical emissions, plus dishwasher-safe cup holders that fold in.
- Con: the heavier listed weight, 21.0 lb, and a page that lists a 30-inch footprint when fully reclined.
Will Three of Either Seat Fit Your Back Seat?
Because both seats list 16.7 inches, the same math covers either one: three seats take 50.1 inches. The table subtracts that from the second-row hip room each automaker lists, which is the same data our sedan fit guide uses. It’s on paper only, since hip room is a cabin measurement and not usable cushion width. We list the model year only; automakers publish one hip-room figure per model, we didn’t confirm trim-by-trim differences, and Toyota’s RAV4 figure comes from its Limited and Woodland specifications.
| Vehicle, second-row hip room (official spec) | Three seats at 16.7 in each | Room left (on paper) |
|---|---|---|
| 2026 Honda Civic, 48.9 in | 50.1 in | -1.2 in |
| 2026 Toyota RAV4, 49.6 in | 50.1 in | -0.5 in |
| 2026 Hyundai Elantra, 50.5 in | 50.1 in | 0.4 in |
| 2027 Toyota Corolla, 51.3 in | 50.1 in | 1.2 in |
| 2026 Toyota Camry, 54.6 in | 50.1 in | 4.5 in |
This is general product research, not a substitute for your seats’ manuals or a car seat inspection. Follow each manual and your vehicle owner’s manual, and have the finished row checked by a certified technician.
The table shows why width alone rarely decides a three-across row. In the Civic and RAV4, three of either seat may not fit. In the Elantra and Corolla the math leaves half an inch to an inch to spare, which may leave little room for a buckle, so measure first. The Camry has room for either on paper. For vehicles not on this list, our 3 car seats across guide explains how to measure your own row.
What Three Seats Cost: The Price Gap Adds Up
If you’re filling a whole row, the $70 gap between the two listed prices repeats for each seat. The table adds it up at the prices on the two pages on October 6, 2026, so it’s arithmetic and not a quote, and prices and stock change.
| Mix for a three-seat row | Seats | Total at listed prices |
|---|---|---|
| All Graco | 3 SlimFit3 LX | $899.97 |
| Two Graco, one Chicco | 2 SlimFit3 LX, 1 Fit3x | $829.97 |
| One Graco, two Chicco | 1 SlimFit3 LX, 2 Fit3x | $759.97 |
| All Chicco | 3 Fit3x | $689.97 |
Mixing brands works for width on paper, since both seats are 16.7 inches. But Graco’s page words its three-across claim as fitting “with select other Graco car seats,” so a mixed row isn’t something that page promises, and mixing changes other things at once: two different install methods, two different cover routines, and two sets of manuals. If one parent installs and the other buckles, matching seats can make the routine easier. That’s a judgment call about habits, not something either manufacturer says.
What Each Page Leaves Out
Some details appear on one page and not the other. We didn’t put them in the main table, because a blank cell can look like a “no” when it only means we didn’t find the number.
| Detail | Where we found it | What to do |
|---|---|---|
| Interior width: 13 in at the shoulder, 12.5 in at the hips | Chicco’s page only | Check Graco’s manual or ask Graco before comparing |
| Footprint of 30 in when fully reclined | Chicco’s page only | Measure Graco’s reclined length yourself |
| Cover removal in 60 seconds, machine washable | Graco’s page only | Read Chicco’s care label for its own method |
| Flame retardant-free, GREENGUARD Gold certified | Chicco’s page only | Ask Graco about its materials if that matters to you |
| Useful life: stop using 10 years after the date of manufacture | Graco’s page only | Check Chicco’s label and manual for its own limit |
This also means we can’t call either seat roomier. Chicco lists interior widths and Graco’s page, as we read it, doesn’t. Neither listing tells you how a given child sits, so measure the child and the seat together if interior space is a worry.
Covers, Cleaning, and Daily Use
Cleaning is where the two pages say the most different things. Graco describes a cover that comes off in 60 seconds, machine washable, without uninstalling the seat or removing the harness. Chicco’s page gives care instructions for the fabrics: machine wash them separately in cold water on a delicate cycle with mild detergent, no bleach, and hang dry, and spot clean the harness with warm water. The Chicco page doesn’t say whether the cover comes off without uninstalling the seat, so we can’t say it does or doesn’t.
If your child eats in the car, the practical question is how often the cover comes off. A cover that is quick to remove may get washed more often, and a cover you must work around the harness to remove may not. That’s our reasoning from the descriptions and not a test of either seat.
Both seats list two cup holders. Chicco says its dishwasher-safe holders fold in to keep the 16.7-inch width, and Graco says its two removable, easy-to-clean holders are designed to work with a three-across installation. Read each manual for how they sit in a crowded row. If you also reuse a seat across children, our car seat expiration date guide explains how to check a seat’s useful life. Graco’s page says to stop using the SlimFit3 LX 10 years after the date of manufacture. We didn’t find a matching statement on Chicco’s page, so check the Fit3x label and manual.
Three Things to Settle in Your Own Car
Spec pages can’t tell you how a seat sits in your vehicle. Before you keep either seat, run through these three checks, ideally with the seat installed and the other seats beside it.
- Install it the way you will every day. Use LATCH or the vehicle belt, whichever your seat position allows, and see how much effort the lock-off or connector takes. The two seats use different hardware, so the same car can feel different with each.
- Check the recline you actually need. More recline positions only help if one of them gets the seat level in your back seat. Try the seat at the angle your child needs, then look at how much row it takes.
- Reach the buckle with the neighbors in place. A seat that fits by width can still block a vehicle buckle, as our guide to buckling car seats too close together explains.
If a seat fails any of these in your car, the spec table doesn’t matter. Return windows exist for exactly this, so keep the box and the receipt until the row has been tested.
Choose Graco If, Choose Chicco If
Choose the Graco SlimFit3 LX if you want the lighter listed weight and a cover that Graco says removes quickly and is machine washable, and you’re comfortable with the higher listed price and four recline positions.
Choose the Chicco Fit3x if you want the lower listed price, more recline and height-adjust positions, ClearTex materials, and cup holders that fold in, and you accept a heavier seat.
Skip the Graco SlimFit3 LX if the higher listed price or the four recline positions rule it out.
Skip the Chicco Fit3x if you want the lighter listed weight, or the 60-second cover Graco describes.
Skip both if your vehicle’s row has less than 50.1 inches of second-row hip room, since three of either seat may not fit. Use our guide to buckling car seats too close together before you commit to a three-across row at all.
Who it’s for: Parents picking between two 16.7-inch all-in-one seats for a three-across row who want the differences the manufacturers print.
Who should skip: Anyone expecting a safety verdict or a test result. We haven’t used either seat, and we don’t rank them on crash protection.
Where to buy: Graco’s site, Chicco’s site or retailer finder, or a major baby retailer with a clear return window. Check the current listing for price, stock, and return terms.
Alternative: Other slim seats from our narrowest car seats for 3 across ranking, or a larger vehicle if the row math doesn’t work.
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By The 4 Kids Dad · Updated October 6, 2026. Parent of 4 kids, including newborn twins. Sources: Graco SlimFit3 LX page and Chicco Fit3x ClearTex page.
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