The following information is copied verbatim from "Your Purebred Puppy, A Buyer's Guide" by Michele Lowell -- an excellent, invaluable book with information on over 160 dog breeds.
Border Terrier
Fine for Novice Owners
Good with Children
Small in Size
Wiry Coat

EXERCISE REQUIRED
TRIMMING/CLIPPING REQUIRED
AMOUNT OF SHEDDING
ACITIVITY INDOORS
EASE OF TRAINING
SOCIABILITY WITH STRANGERS                              
High          Med          Low
                 8=8
                 8=8
                                   8=8
                 8=8
8=8
8=8
Temperament

          He is quieter, milder-mannered, and more obedient than most terriers, but still very hardy and plucky.  Some Borders are tougher and more work-oriented than others.  He's so adaptable that he's fine in any home that gives him daily companionship, long walks, and an occasional run in a safe, enclosed area.  He's usually friendly with strangers, but some are timid, so he should be accustomed to people and noises at an early age.  Unlike many terriers, he's usuall fine with other dogs, but must be watched around small pets like cats and rabbits, for he can be a single-minded chaser.  Borders are inquisitive and explorative, and can get themselves into trouble by crawling into tight holes; although their loose skin often enables them to wriggle out by themselves, you should inspect your home for openings that a Border may not be able to resist.  Eager to please and sensitive to correction, he's very responsive to obedience training.  Never hit a terrier, and don't play aggressive games like wrestling or tug-of-war.  He likes to dig; some will bark a bit.
History

          This hardy hunter of fox, badger, and barnyard varmints originated in the rugged Cheviot Hills on the border between England and Scotland.  Today he is a companion, but he can still dispatch vermin and makes an excellent farm dog.  AKC popularity: 88th of 130 breeds.
Physical Features
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He stands 12-15 inches and usually weighs 15-18 pounds.
His coat is short and harsh and should be brushed twice a week.  Straggly hairs should be scissored and dead hairs stripped twice a year.  He is wheaten (tan), or reddish brown, with black-tipped hairs and dark ears.  Blue-and-tan is less common.  A little white on his chest is allowed.
His ears hang down.  His eyes are dark with a keen expression.  His nose is black.  His teeth meet in a scissors bite.
Faults: He should not have white hairs on his feet.
Health Problems

          He is susceptible to some congenital heart problems.  Like many stoic terriers, he is relatively insensitive to pain and shows few signs of illness; it is up to his owner to watch his health carefully.
Cautions when Buying

          Don't choose the most scrappy or independent Border puppy, and don't choose a timid puppy.