Coming from someone who goes through a fair few design portfolios as well as my updating my own, I would say:
More photos than text! The object is what they are interested in, they are hiring you mainly for what you can make. That should be the first thing they see.
I like to see a title to the object, I sometimes refer to that object to the potential employee. That way I can ask them questions about it and you know what item I am on about.
Also a small description, Show that you know some of the lingo, what materials it is made from, comments on the design like; its based on a danish mid century furniture (shows you know some history ) , how its finished etc. Information that tells them you know your stuff. But keep it short.
Keep it short: I do not like it when portfolios never end, it should be short enough that there are enough items to convey your skill, too many and the reader will get bored.
Try not to cram too much into a page, you want to show the objects nice and big. I prefer a landscape document with 1-2 items on each page. for you best pieces spread it across a full page, one big image on one side and then a few smaller ones grouped together on the other showing different angles or even a mid project photo.
If you have a 'style' you may want to group those items together to show you can apply your 'style' to multiple items; whether it may be on the same page or across a double page spread. I want to see them side by side.
Put what you feel is your best work in there and try not to put them in an order. I have seen a few where the first 1,2 pieces are really nice then as you go on they are not quite as nice as those first pieces. You do not want them to go away thinking about what they have seen last. Keep your order varied then they will be looking forward to the next page.
Design wise, Try to match it to your style. Me personally, I always like the modern looking ones: White, clean simple text, nice font, coherent design across the portfolio. Great picture/s of the items. Short description of item. This works really well.
You may want to end on a page about you, If they are looking to hire they want you to be relatable. You could show a few picture of you working on projects mid way, show some of the design work (sketches etc) that are projects featured in your portfolio.
Hope that helps a little. Feel free to ask any questions