Pattern Profile: Almond, Cinnamon, Citrus (1979); Slate (1982); Heather (1983); Cobalt, Onyx (1984) 

The Dimension IV product line was introduced late 1979 with Almond, Cinnamon and Citrus.  Slate appears to be a new addition in 1982, and Heather was introduced in 1983.  The debut of Cobalt and Onyx seems to be 1984.  The patterns of Dimension IV were the first to appear with a new narrow rimmed shape in dinner plates, luncheon plates, side plates and soup plates. 

Solid-coloured Pyrex mugs with a flared shape were also part of the sets.  Optional items available for separate purchase include dessert bowls, soup/cereal bowls, serving bowls and platters, but these have the usual coupe shape instead.

(l-r):  Luncheon Plates: Cinnamon, Heather;  Platter: Onyx; 
Dinner Plates: Slate, Citrus, Almond.

Citrus was discontinued in 1983, Almond in 1984.  1985 was the final year of production for the remaining patterns: Cinnamon, Slate, Heather, Cobalt and Onyx.  In 1985 a new wider rimmed plate style was implemented for many new patterns and the narrow rimmed shape of Dimension IV would be abandoned.

A small selection of Pyrex items co-ordinate with Dimension IV patterns.  Offered during 1980 & 1981, the Baker in a Hammock matches Almond, Cinnamon and Citrus.  During the early to mid 1980s, Store 'N' See canisters were topped with solid coloured lids in Cinnamon, Slate and Almond Mocha.  There are at least two Bake 'N' Carry sets comprised of a solid-coloured 475 casserole paired with a plain clear lid and a quilted cozy.  One set was named Country Cinnamon, and the other set matches Slate, but its official name is unknown.

Cobalt soup plate, side plates.  With three very thin equally-spaced bands, Cobalt is quite different from the others in this product line.  Some Cobalt items have just two thin blue bands.

For three Dimension IV patterns, the same coloured bands would take on a new life with coupe plates in 1986 within the Livingware line.  Chestnut is the coupe version of Cinnamon, Indigo is the coupe version of Slate, and Dusk is the coupe version of Onyx.  Mugs made of Suprema were included in these sets, and another distinction is the single coloured band on dessert bowls and soup/cereal bowls in the new versions.   

Soup Plates: Cinnamon, Citrus.  Dimension IV was the first product line to include 8½" flat-rimmed soup plates.

Colour Schemes: 

The dominant colour on the wide outer band is listed first. 

Citrus - orange & bright yellow
Almond - tan & light yellow
Cinnamon (& Chestnut) - rust & tan
Slate (& Indigo) - blue & grey
Heather - green & pink
Cobalt – 3 thin equidistant dark blue bands
Onyx (& Dusk) - black & grey (with thinner bands)
                 
(Photo: Coupe-shaped bowls.  10 oz, Cinnamon; 18 oz, Slate & Citrus.)

Corelle Dinnerware:

Rimmed Plates (narrow):
Dinner Plate (10¼")
Luncheon Plate (8½")
Side Plate (6¾")
Flat Rim Soup Plate (8½")

Dessert Bowl (10 oz 5 3/8")
Soup/Cereal Bowl (18 oz 6¼") *

1 Qt Serving Bowl (8½") ‡
2 Qt Serving Bowl (10¼") ‡
Oval Platter (12½") ‡

* - It is unknown whether 18 oz bowls were made for Heather or Cobalt, but fully decorated 10 oz bowls exist for these patterns.

‡ - Platters and serving bowls for Cinnamon, Slate and Onyx are decorated with a full pattern and are practically the same as those made for Chestnut, Indigo and Dusk.  But since they were manufactured at different times, they have different backstamps.

Pyrex Mug (flared, solid colour, 9 oz):
Citrus (orange)
Almond (tan)
Cinnamon (rust)
Slate (medium slate blue)
Heather (green)
Cobalt (dark cobalt blue)
Onyx (black)

(Photo: Pyrex mugs, Citrus, Almond, Cobalt, Cinnamon, Slate, Onyx)
              
Cobalt is depicted in a 1985 catalogue image.  Small side plates and all sizes of coupe bowls in this pattern have two dark blue bands.  Platters, dinner plates, luncheon plates and soup plates have three bands.

Exceptions:
Almond, Cinnamon and Citrus can be found on coupe-shaped plates as well.  Their backstamps show that they are from 1979 & 1980.  Naturally, since Cinnamon became Chestnut in 1986, coupe-shaped plates with Cinnamon's coloured bands are not uncommon, but it is unusual to see them with an older backstamp.  It is particularly unusual to find Almond and Citrus on a coupe plate since these colours did not transition to that shape when Dimension IV was discontinued.

Almond luncheon plates with a coupe shape.  Dinner plates also exist, and these shapes can be found in Citrus too.

In catalogues and advertisements, photos of the Baker In A Hammock depict Almond, Cinnamon and Citrus dinner plates alongside the matching Pyrex bakeware.  Inexplicably, the plates in the photo are coupe rather than the usual Dimension IV shape.  Other than that, the coupe versions of these patterns are not mentioned in any company literature or advertising, so nothing certain is known about them.  They might be from the test marketing phase.

Related Articles:

Pyrex Flared Mug (1979)
Pattern List: Soup Plates
Plate Styles: Narrow Rimmed
Forget-Me-Not (1983)
Currier & Ives Collection (1984)
Chestnut, Indigo, Dusk (1986)