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

Input:
Question: what are the measurements of the scale in inches
Document: I have to weigh out portions to make sure the carbohydrate count is accurate for my type 1 diabetic step-son. This is perfect because I can change between measurements and I can add more without having to start all over. Overall this is a very functional scale.
I've had this for about a week now and had reason to use it on a few occasions. The scale seemed to work pretty well but I'm now having issues where the measurements vary, and the unit is giving a "Lo" message before shutting off. So I guess after using it for 3-4 days I already have to replace the battery.
I used this scale daily for 7 months to measure out food for my dog (she's overweight and on a strict diet). All of a sudden it just went haywire and I really can't use or trust it anymore. While I'm weighing the food it will suddenly drop to zero or some other random amount that is lower than what is actually on the scale (without being touched or bumped at all). It also will suddenly and frantically switch between measurements (grams, mls, etc.)
Perfect size for apartment counters. Does the job perfectly. I use it everyday for portion control as well as when I bake and need exact measurements.
I will not be purchasing another scale from this company again.
some times it dont want to go off but over all its a great scale! I love it so much
This scale is great and accurate. It is great size and easy to use. I would purchase this item again.
Works perfectly. does everything we need it to. Great price. Arrived on time. Have not had any issues with the scale. Great Buy!
It is exactly as one would think, simple and easy to use. The scale works well and is priced reasonably.
This scale is great value for money. I looked at many digital scale some as much as three times the cost of this scale. This does it all.
Answer: The usable weighing surface is about 5.5 inches X 5.5 inches. If the material slightly extends past this it seems to be no problem.I use it mostly to weigh dough for baking equal quantities.