Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will the 6" x 4" cards fit if they have the plastic sleeve protectors on them?
Document: Very nice solid wood best for 4 x 6 index cards. Props up recipe card on top so easy to see when working with your recipes. A must have for the home cook.
Box is beautiful! Great size. Not too big but plenty of room. Mouth of it opens wide. I am glad it can hold the larger 4 x 6 index cards as opposed to the smaller 3 x 5 cards. The box has really motivated me to set up my recipes. I like the dividers that it comes with (cards are not included). I have zero complaints. So great that it can also hold the recipe card on top.
I am using it with the CR Gibson A La Carte Design Recipe Cards (4 by 6-Inch). :):):)
For the price, fit and finish is quite nice. Mine came with a packet of ten divider cards (with tabs) packed inside. The box is larger than I expected. It measures 7" across the front, 6" from front to back, and a bit over 5" tall. Inside, there's a fixed wooden divider in the middle.
The finest looking recipe box on the market, the fit and finish is just gorgeous. There are brass hinges that are recessed mounted on the inside of the box into the lid and box so they fit flush and do not catch on anything. There is a wood divider in the middle of the box to separate some of your recipe cards. Perfect for 6"x4" recipe cards. The slot on the top of the lid will hold a recipe card while you prepare and cook tonight's masterpiece.
I rarely take the time to submit reviews and I should because I do rely on the reviews of others. But I felt compelled to write this review because of some reviews left by others. I saw a number of reviews where folks complained about the quality of the item they received - lid didn't fit, joints were poor, etc. I ordered 4 recipe boxs, in spite of those comments because I was ordering early enough that if anything was not acceptable, I had time to exchange.
I couldn't have asked for a better recipe box. 4x6 cards fit with no problem and TABBED 4x6 cards fit without the tabs hitting the lid. Perfect box and beautifulwood grain. My wife loved it! There is nothing bad I can say about this box. I don't see how it could have been built any better. I recommend this highly.
This recipe box was  purchased as a Christmas gift. I am very pleased with the looks and the box is hardy and will hold up to frequent use. It holds 4x6 cards perfectly, as described and I also purchased category label cards which also fit well and the tabs show. The clearance (to the tops of label cards) is just right when lid is dropped. I recommend this recipe box. The price is very reasonable as the wood grain is beautiful and the box is well made.
Great size, holds everything well from small to large and the card holder on the lid is handy. The fit and finish is very nice and, though it is a very simple design, it is quite lovely.
I would highly recommend this recipe boxes and I've bought three for my own recipes. This recipe box fit on your kitchen count and look very good.An Epicurean Bon Appetite
Answer: The inside measurement is actually 6.25 inches so seems that there would be plenty of room.